[EN] ASYMMETRIC BISAMIDATION OF MALONIC ESTER DERIVATIVES<br/>[FR] BISAMIDATION ASYMÉTRIQUE DE DÉRIVÉS D'ESTER MALONIQUE
申请人:SANDOZ AG
公开号:WO2017029362A1
公开(公告)日:2017-02-23
The present invention relates to processes, process steps and intermediates useful in the asymmetric bisamidation of malonic ester derivatives wherein the new processes, process steps and intermediates are, for example, useful in the preparation of asymmetric malonic acid bisanilides such as cabozantinib.
Synthesis of Functionalized Pyrrolidinone Scaffolds via Smiles-Truce Cascade
作者:Thomas Sephton、Jonathan M. Large、Sam Butterworth、Michael F. Greaney
DOI:10.1021/acs.orglett.3c02559
日期:2023.9.15
with cyclopropane diesters under simple base treatment to give α-arylated pyrrolidinones. This one-pot process comprises three steps: nucleophilic ring-opening of the cyclopropane, reaction of the resulting enolate in a Smiles-Truce aryl transfer, and lactam formation. The reaction represents a new, operationally simple approach to biologically active pyrrolidinones and expands Smiles-Truce arylation
The heterocyclic antitumor drug cabozantinib was synthesized by condensation of 4-(6,7-dimethoxyquinolin-4-yloxy)aniline and methyl 1-(4-fluorophenylcarbamoyl)cyclopropanecarboxylate the presence of two equivalents of sodium methoxide and azeotropic removal of methanol. In turn, the intermediate methyl 1-(4-fluorophenylcarbamoyl)cyclopropanecarboxylate was prepared from 4-fluoroaniline and dimethyl 1,1-cyclopropanedicarboxylate in the presence of one equivalent of sodium methoxide. Four crystal structures of intermediates and a byproduct were determined.
PROCESS FOR PREPARING QUINOLINE DERIVATIVES
申请人:Exelixis, Inc.
公开号:EP2768796B1
公开(公告)日:2019-11-20
PYRAZOLO[1,5-A]PYRIDINE DERIVATIVES AND METHODS OF THEIR USE