Heterocyclic sulfonamide derivative and medicine comprising same
申请人:EA PHARMA CO., LTD.
公开号:US10626112B2
公开(公告)日:2020-04-21
The present invention provides a compound represented by the formula (I):
wherein each symbol is as defined in the DESCRIPTION, or a pharmaceutically acceptable salt thereof. The compound has a superior TRPA1 antagonist activity, and can provide a medicament useful for the prophylaxis or treatment of diseases involving TRPA1 antagonist and TRPA1.
Carboxylate Directed Cross-Coupling Reactions in the Synthesis of Trisubstituted Benzoic Acids
作者:Ioannis N. Houpis、Changkang Huang、Ulrike Nettekoven、Jason G. Chen、Renmao Liu、Martine Canters
DOI:10.1021/ol802349u
日期:2008.12.18
The carboxylate anion has been used as a directing group to effect selective ortho-substituted derivatives 3 (>99:1 selectivity 50-80% yield). The solvent, base, and equivalents of base are the determining factors for the success of this reaction. The directing effect can be reversed by the appropriate use of phosphine ligands to prepare the para-substituted 4 selectively (ca. 12:1 selectivity).