AbstractThe exploration of the complex chemical diversity of bicyclo[n.1.1]alkanes and their use as benzene bioisosteres has garnered significant attention over the past two decades. Regiodivergent syntheses of thiabicyclo[4.1.1]octanes (S‐BCOs) and highly substituted bicyclo[2.1.1]hexanes (BCHs) using a Lewis acid‐catalyzed formal cycloaddition of bicyclobutanes (BCBs) and 3‐benzylideneindoline‐2‐thione derivatives have been established. The first hetero‐(4+3) cycloaddition of BCBs, catalyzed by Zn(OTf)2, was achieved with a broad substrate scope under mild conditions. In contrast, the less electrophilic BCB ester undergoes a Sc(OTf)3‐catalyzed [2π+2σ] reaction with 1,1,2‐trisubstituted alkenes, yielding BCHs with a spirocyclic quaternary carbon center. Control experiments and preliminary theoretical calculations suggest that the diastereoselective [2π+2σ] product formation may involve a concerted cycloaddition between a zwitterionic intermediate and E‐1,1,2‐trisubstituted alkenes. Additionally, the hetero‐(4+3) cycloaddition may involve a concerted nucleophilic ring‐opening mechanism.
[EN] PROCESS FOR THE PREPARATION OF LOMITAPIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE LOMITAPIDE
申请人:HETERO RESEARCH FOUNDATION
公开号:WO2016071849A1
公开(公告)日:2016-05-12
The present invention relates to a process for preparing Lomitapide or its pharmaceutically acceptable salt thereof having high purity with acceptable levels of impurities.
本发明涉及一种制备具有可接受杂质水平的高纯度洛米他派或其药用可接受盐的方法。
[EN] CRYSTALLINE POLYMORPH OF N-(2,2,2-TRIFLUOROETHYL-9-[4-[R4-R[[[I4'- (TRIFLUOROMETHYL) [ 1,1 ' -BIPHENYL] -2-YL] CARBONYL] AMINO] -1 -PIPERIDINYL] BUTYL] -9H- FLUORENE-9-CARBOXAMIDE METHANESULFONATE AND PROCESS FOR PREPARATION THEREOF<br/>[FR] POLYMORPHE CRISTALLIN DE N-(2,2,2-TRIFLUOROÉTHYL-9-[4-[R4-R[[[I4'- (TRIFLUOROMÉTHYL)[ 1,1'-BIPHÉNYL]-2-YL]CARBONYL]AMINO]-1-PIPÉRIDINYL]BUTYL]-9H-FLUORÈNE-9-CARBOXAMIDE MÉTHANESULFONATE ET PROCÉDÉ POUR SA PRÉPARATION
申请人:MSN LABORATORIES PRIVATE LTD
公开号:WO2017098522A1
公开(公告)日:2017-06-15
The present invention relates to„ crystalline polymorph of N-(2,2.2-trifluoroethyl)-9- [4- [4- [ [[4,-(trifluoromethyl) [1,1 '-biphenyl] -2-yl] carbonyl] amino] - 1 -piperidinyl] butyl] -9H- fluorene-9-carboxamide methanesulfonate salt represented by the following structural formula- la and process for preparation thereof.
2-Oxabicyclo[2.1.1]hexanes as saturated bioisosteres of the ortho-substituted phenyl ring
作者:Aleksandr Denisenko、Pavel Garbuz、Nataliya M. Voloshchuk、Yuliia Holota、Galeb Al-Maali、Petro Borysko、Pavel K. Mykhailiuk
DOI:10.1038/s41557-023-01222-0
日期:2023.8
Here we have developed saturated bioisosteres of the ortho-substituted phenyl ring with improved physicochemical properties: 2-oxabicyclo[2.1.1]hexanes. Crystallographic analysis revealed that these structures and the ortho-substituted phenyl ring indeed have similar geometric properties. Replacement of the phenyl ring in marketed agrochemicals fluxapyroxad (BASF) and boscalid (BASF) with 2-oxabicyclo[2
The present invention relates to a process for preparing Lomitapide or its pharmaceutically acceptable salt thereof having high purity with acceptable levels of impurities.