BLDpharm

A leading research chemicals manufacturer especially in building blocks.
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[BLDpharm @BldPharm]

#BLDSynthesis 🧪 From FDA-Approved Zidesamtinib: 1-Arylethan-1-ols

Zidesamtinib (drug name: Jideytro), developed by Nuvalent and acquired by GSK, was approved by the U.S. FDA on July 22, 2026, for the treatment of adults with locally advanced or metastatic ROS1-positive non-small cell lung cancer (NSCLC) who have previously received a ROS1 kinase inhibitor. It is a next-generation, brain-penetrant, ROS1-selective tyrosine kinase inhibitor (TKI) designed to overcome resistance associated with treatment-emergent ROS1 mutations while maintaining activity against intracranial disease.
[More Info] 📰 https://t.co/Rjyes1QSnn

Zidesamtinib contains a 1-arylethan-1-ol motif (🔎 WO2023056405), a versatile structural unit found in numerous bioactive molecules and pharmaceutical intermediates. The hydroxyl group provides opportunities for hydrogen-bonding interactions with biological targets, while the adjacent stereogenic center can influence binding affinity and selectivity. In synthetic chemistry, 1-arylethan-1-ol derivatives also serve as valuable building blocks for the preparation of structurally diverse medicinal compounds.

👇 Try @BldPharm's 1-arylethan-1-ols in your research!
🛒 https://t.co/AabllKE4Ar

#FDA #Zidesamtinib #Aryl #HydrogenBond

[BLDpharm @BldPharm]

#BLDSynthesis 🧪 From NMPA-Approved Oveporexton: 3,3-Difluoropyrrolidines

Recently, China's National Medical Products Administration (NMPA) approved Oveporexton (TAK-861, drug name: ORZEYFUL) through the priority review pathway for the treatment of narcolepsy type 1 (NT1) in adolescents aged 16 years and older and adults. Oveporexton is a highly potent, orally available, and selective orexin receptor 2 (OX2R) agonist designed to restore orexin signaling disrupted in NT1.
[More details] 📌 WO2020158958
NMPA 📰 https://t.co/wmH9lIDQJf
NATURE 📰 https://t.co/f3KWxYxJNg

Oveporexton incorporates a 3,3-difluoropyrrolidine scaffold, an important fluorinated heterocycle in medicinal chemistry. The introduction of the gem-difluoro group can fine-tune the electronic properties, basicity, and conformation of the pyrrolidine ring while enhancing metabolic stability. Owing to these favorable characteristics, 3,3-difluoropyrrolidines have become valuable structural motifs for optimizing the potency, selectivity, and drug-like properties of therapeutic candidates.

Try @BldPharm's 3,3-Difluoropyrrolidines in your research!
🛒 https://t.co/8H1TRlVoJR

#Difluoropyrrolidine #NMPA #Oveporexton #AliphaticHeterocycles

[BLDpharm @BldPharm]

#BLDseries 🔥 Aryl β3 Amino Acids

Aryl β3 amino acids are an important class of β-amino acids in which the amino group is located at the β3-position relative to the carboxyl group. They can be prepared stereospecifically from readily available α-amino acids and are widely used as building blocks in β-peptide chemistry. Compared with β2-amino acids, β3-amino acids are more stable and less prone to racemization or epimerization during synthesis and peptide coupling.

Several methods have been developed for the synthesis of β3-amino acids from α-amino acids. The most widely used method is the Arndt–Eistert homologation, which is efficient and requires only a few steps. Other methods include the Kowalski homologation, the Coates homologation, and the classical Kolbe homologation. Among them, the Arndt–Eistert method is generally considered the most practical because it uses commercially available protected α-amino acids and gives β3-amino acid derivatives efficiently.
[More details] 📰 https://t.co/IFz5A5SbLe

Try @BldPharm's aryl β3 amino acids in your research！
🛒 https://t.co/s3ERw34hgy

[BLDpharm @BldPharm]

#BLDseries 🔥 Imidazo[2,1-b][1,3,4]thiadiazoles

Imidazo[2,1-b][1,3,4]thiadiazole is a fused bicyclic heteroaromatic scaffold composed of an imidazole ring condensed with a 1,3,4-thiadiazole moiety. Owing to its rigid, planar structure and the presence of multiple nitrogen and sulfur heteroatoms, this privileged scaffold exhibits favorable electronic properties and enables diverse intermolecular interactions with biological targets.
Consequently, imidazo[2,1-b][1,3,4]thiadiazole derivatives have attracted considerable interest in medicinal chemistry and have demonstrated broad pharmacological potential, including activities in the central nervous system, infectious diseases, cardiovascular disorders, and oncology.

Representative drug candidates containing this scaffold include:
💊 Padsevonil: GABAA receptor agonist (Phase I)
💊 ACT-678689: Tryptophan hydroxylase (TPH) inhibitor
💊 INE963: Antimalarial agent (Phase II)
💊 BMS-986120: PAR4 antagonist (terminated in Phase II)
💊 E260: Fer/FerT kinase inhibitor (preclinical)

Try @BldPharm's imidazo[2,1-b][1,3,4]thiadiazoles in your research!
🛒 https://t.co/N3xSSC9BpI

[BLDpharm @BldPharm]

#BLDseries 🔥 Spiro[3.3]heptanes

Spiro[3.3]heptane is a rigid, saturated spirocyclic hydrocarbon composed of two cyclobutane rings connected through a shared quaternary carbon atom. As a highly three-dimensional scaffold with well-defined geometry, it has attracted increasing attention in medicinal chemistry as a bioisostere for benzene, offering the potential to improve physicochemical properties such as solubility, metabolic stability, and spatial diversity. Recent applications of this motif have been reported in drug discovery programs, including a NAMPT modulator (US20230348369) and an indoleamine 2,3-dioxygenase inhibitor (US20210047290).

👇 Try BLDpharm's spiro[3.3]heptanes in your research!
🛒 https://t.co/x8dmDHp8w7

[BLDpharm @BldPharm]

#BLDseries 🔥 Benzoxaboroles

Benzoxaboroles are cyclic hemiboronic acids that exhibit unique acid–base behavior and Lewis acidity arising from the boron center. In aqueous media, their dissociation equilibrium proceeds through indirect hydronium ion formation and generation of a tetrahedral dihydroxyboryl conjugate base of the type ([RXB(OH)2]—M+). Formation of a simple Brønsted base species ((RXB-O—) is energetically disfavored in water; computational studies indicate that the dihydroxyboryl anion is preferred by nearly 20 kcal/mol, primarily because of the formation of an additional strong B-O bond.

Similar to other boronic acid derivatives, benzoxaboroles function as Lewis acids, and their chemical reactivity is closely related to their acidity and boron coordination state. Under typical organic solvent conditions, benzoxaboroles predominantly exist in their neutral cyclic acid form. Their ability to reversibly interconvert between neutral trigonal and anionic tetrahedral boron species contributes to their distinctive physicochemical properties and underlies many of their applications in medicinal and synthetic chemistry.

🛒 Try @BldPharm's benzoxaboroles in your research!
👉 https://t.co/jywl62ExHW

[BLDpharm @BldPharm]

#BLDseries | 2-Azaspiro[3.3]heptanes
2-Azaspiro[3.3]heptane is a useful bioisostere of piperidine in medicinal chemistry. It possesses physicochemical properties comparable to piperidine, including similar nitrogen basicity, lipophilicity (cLogP and logD), and metabolic stability (CLint).
📰 https://t.co/IcpTUnufCY
📰 https://t.co/93WtMkVGc2
In addition, its rigid spirocyclic structure increases molecular three-dimensionality and can help optimize pharmacokinetic properties. As a result, 2-Azaspiro[3.3]heptane has been widely adopted in drug discovery programs and is found in several biologically active molecules, for example the KRAS G12C inhibitor Opnurasib and the 3CLpro inhibitor Secutrelvir.

👇 Try @BldPharm's 2-Azaspiro[3.3]heptanes in your research!
https://t.co/fWw5PGdj3a

[BLDpharm @BldPharm]

#BLDevents 📸 We had a very enjoyable day at the 2nd Innovations in Peptide Science 2026!
Thanks to everyone who stopped by to chat with BLDpharm. 🥰
We hope you all found the discussions insightful and also liked our small souvenirs!
📍 Nottingham, UK
#PeptideTherapeutics #DrugDiscovery #ScienceConference #ChemicalBuildingBlocks

[BLDpharm @BldPharm]

#BLDseries | β3-Amino Acids
β3-Amino acids are an important class of β-amino acids characterized by the presence of an additional carbon atom between the amino and carboxyl groups. In β3-amino acids, the side chain is attached to the carbon atom adjacent to the amino group, distinguishing them from β2-amino acids. Compared with conventional α-amino acids, β3-amino acids provide greater conformational flexibility and enhanced resistance to enzymatic and proteolytic degradation. These properties make them valuable building blocks for β-peptides, which can adopt predictable secondary structures and exhibit remarkable metabolic stability. Owing to their structural diversity and self-assembly capability, β3-amino acid-containing peptides have attracted considerable attention in medicinal chemistry, biomaterials, and drug delivery applications.
📰https://t.co/qeb549V7dY

Beyond peptide synthesis, β3-amino acid motifs are also found in several small-molecule pharmaceuticals. Notably, the antidiabetic drugs Sitagliptin and Evogliptin, both DPP-4 inhibitors used for the treatment of type 2 diabetes mellitus, contain β3-amino acid-derived structural features. The incorporation of β3-amino acid units can improve biological activity, metabolic stability, and pharmacokinetic properties, highlighting their significance in modern drug design.

👇 Try @BldPharm's β3-amino acids in your research！
https://t.co/hmN7JiJCOF

[BLDpharm @BldPharm]

#BLDevents 📸 the #ISMSC2026 conference in #Bordeaux is ongoing!
Our team's Martha welcomes all scientists to join our interactive mini-game, to share your insights and to discuss how @BldPharm can support your project! 🥰

#Chemistry #ChemicalSynthesis #ScienceConference #ChemicalBuildingBlocks #OrganicChemistry

[BLDpharm @BldPharm]

#BLDseries | 3,6-Diazabicyclo[3.1.1]heptanes
The conformationally constrained, C(sp3)-rich polycyclic scaffold 3,6-diazabicyclo[3.1.1]heptane has recently attracted increasing interest in medicinal chemistry as a three-dimensional bioisostere for planar aromatic heterocycles such as pyrazine. Incorporation of nitrogen atoms into the fused four-membered ring significantly modulates the electronic properties of the framework by reducing amine basicity and activating adjacent C–H bonds. Compared with aromatic systems, this rigid saturated bicyclic motif provides enhanced three-dimensionality and higher sp3 character, features that are often associated with improved physicochemical and pharmacokinetic properties, including better solubility, reduced lipophilicity, and potentially enhanced metabolic stability. Owing to these unique structural and electronic characteristics, 3,6-diazabicyclo[3.1.1]heptane represents a promising scaffold for the design of next-generation drug candidates.
📰 https://t.co/aqmrg8uCWW

👇 Try @BldPharm's 3,6-diazabicyclo[3.1.1]heptanes in your research!
https://t.co/ri2GuR57rQ

[BLDpharm @BldPharm]

#BLDseries | Thieno[2,3-d]pyrimidines
Thieno[2,3-d]pyrimidine is a privileged fused heterocyclic scaffold widely used in medicinal chemistry because of its favorable binding and drug-like properties. For example, this scaffold is present in the approved MLL1 inhibitor ziftomenib, the preclinical Mcl-1 inhibitor S63845, the phase I/II Mcl-1 inhibitor MIK665, and the preclinical HSP90 inhibitor VER-82576, highlighting its versatility in anticancer drug discovery.

👇 Try @BldPharm's Thieno[2,3-d]pyrimidines in your research!
https://t.co/t5nOnLGQfr

[BLDpharm @BldPharm]

#BLDSynthesis 🧪 From NMPA-Approved Lanoracopan: Piperidin-4-ols

Lanoracopan hydrochloride (drug name: 依适宁) is a novel Class 1 innovative drug developed by Wuhan Createrna Science and Technology Co., Ltd. Recently approved by China’s National Medical Products Administration (NMPA) through the priority review pathway, Lanoracopan is indicated for the treatment of adult patients with paroxysmal nocturnal hemoglobinuria (PNH) who have not previously received complement inhibitor therapy.
📰 👉 https://t.co/ySlg4QqJZL

Lanoracopan contains a Piperidin-4-ol moiety. Piperidin-4-ols are six-membered saturated nitrogen heterocycles featuring a hydroxyl group at the 4-position of the piperidine ring. This privileged scaffold is widely used in medicinal chemistry because it can enhance hydrogen-bonding interactions, improve aqueous solubility, and optimize pharmacokinetic properties. Consequently, Piperidin-4-ol derivatives are frequently incorporated into bioactive molecules and therapeutic agents.

👇 Try @BldPharm's piperidin-4-ols in your research！
https://t.co/GAIhQC1XIc

#Lanoracopan #NMPA #Piperidin4ol

[BLDpharm @BldPharm]

#BLDevents 📍 BLDpharm is excited to be a sponsor of the one-day event: 2nd Innovations in Peptide Science 2026!

Visit us at Booth No.4️⃣ to learn more about our innovations and explore potential collaboration opportunities in peptide science.
👋 See you there!

#Peptide #BioChem #LifeScience

[BLDpharm @BldPharm]

#BLDevents 📸 Great connecting with scientists at #SCF2026 Congress! Thanks for joining our interactive mini-game and sharing your insights. 🥰
Looking forward to seeing you again soon to discuss how @BldPharm can support your next project! 💪

#Chemistry #ChemicalSynthesis #DrugDiscovery #ScienceConference #ChemicalBuildingBlocks

[BLDpharm @BldPharm]

#BLDSynthesis 🧪 From FDA-Approved Tebipenem Pivoxil: Azetidine-3-thiols

Tebipenem pivoxil is an orally available prodrug of tebipenem, a broad-spectrum carbapenem antibiotic. On June 17, 2026, the FDA approved Utebzi(tebipenem pivoxil) for the treatment of complicated urinary tract infections (cUTIs), including pyelonephritis, caused by susceptible microorganisms in adults with limited or no alternative oral treatment options.
📰 https://t.co/m8YxbY8lQ3

Tebipenem pivoxil contains an azetidine-3-thiol scaffold, a four-membered sulfur-containing heterocyclic motif found in several β-lactam antibiotics. The azetidine ring introduces significant ring strain and conformational rigidity, while the thiol substituent contributes to the unique chemical reactivity and biological activity of this class of compounds.

👇 Try @BldPharm's azetidine-3-thiols in your research!
https://t.co/IIgiNrasH1

#Tebipenem #FDA #Azetidine3thiol

[BLDpharm @BldPharm]

#BLDevents 📍 We are happy to announce that @BldPharm will be a sponsor of the conference ISMSC 2026 in #Bordeaux!
Our team member will be present at this symposium. We invite all researchers to visit our booth to explore collaboration opportunities.

#ISMSC2026 #MacrocyclicChemistry #SupramolecularChemistry

[BLDpharm @BldPharm]

#BLDSynthesis 🧪 From FDA-Approved Gadoquatrane: DOTAs

Gadoquatrane (drug name: Ambelvist) is a next-generation intravenous macrocyclic gadolinium-based contrast agent approved by the U.S. FDA in June 2026 for contrast-enhanced MRI. It is indicated for detecting and visualizing lesions with abnormal vascularity in the central nervous system and non-CNS body regions in adults and pediatric patients, including term neonates. Featuring a novel tetrameric structure and high relaxivity, gadoquatrane provides effective imaging at the lowest approved gadolinium dose among U.S. macrocyclic GBCAs.
📰 https://t.co/A3ISHbv6Kh

Gadoquatrane is a tetrameric gadolinium-based contrast agent composed of four gadolinium ions, each tightly coordinated by a macrocyclic chelator derived from DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid). DOTA plays a critical role in the molecule by providing exceptional thermodynamic stability and kinetic inertness, which help minimize gadolinium release. The tetrameric architecture also contributes to the high relaxivity of gadoquatrane, enabling effective imaging at a reduced gadolinium dose.

👇 Try @BldPharm's DOTAs in your research！
https://t.co/g8EhKeJTBJ

#Gadoquatrane #FDA #DOTA

[BLDpharm @BldPharm]

#BLDSynthesis 🧪 From NMPA-Approved Conteltinib: 6,7-Dihydro-5H-pyrrolo[2,3-d]pyrimidines

Conteltinib (drug name: 首要泽) is a novel anaplastic lymphoma kinase (ALK) inhibitor developed by Shouyao Holdings (Beijing) Co., Ltd. and approved by China’s National Medical Products Administration (NMPA). It is indicated as monotherapy for patients with ALK-positive, locally advanced or metastatic non-small cell lung cancer (NSCLC) who have not previously received ALK-targeted therapy.
📰 https://t.co/O93eUxqkju

Conteltinib incorporates the 6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine scaffold, a partially saturated fused pyrrolopyrimidine framework. Compared with fully aromatic pyrrolopyrimidines, this semi-saturated bicyclic motif provides increased three-dimensionality and conformational flexibility while retaining the favorable hydrogen-bonding characteristics of the pyrimidine ring. These features can enhance target selectivity and optimize physicochemical properties, making it an attractive scaffold for medicinal chemistry and kinase inhibitor design.

👇 Try @BldPharm's 6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidines in your research!
https://t.co/ZGbgQL40Pj

#NMPA #Conteltinib #ALK #NSCLC