Development of an Acyl Sulfonamide Anti-Proliferative Agent, LY573636·Na
摘要:
The synthesis of 5-bromo-thiophene-2-sulfonic acid 2,4-dichlorobenzoylamide sodium salt on multikilogram scale is described. The initial clinical supplies were made using carbonyl diimidazole to converge the two fragments. A more efficient acid chloride process has been developed, which also provides better control of impurities and color throughout the synthesis.
Iron-catalyzed kinetic resolution of N-sulfonyl oxaziridines
作者:Kevin S. Williamson、James W. Sawicki、Tehshik P. Yoon
DOI:10.1039/c4sc01371a
日期:——
We have developed a highly selective kinetic resolution of N-sulfonyl oxaziridines. This reaction utilizes an inexpensive and easily synthesized iron bis(oxazoline) catalyst to promote the efficient rearrangement of oxaziridines to the corresponding N-sulfonyl imides; no sacrificial reagents are required to effect this resolution. This process is readily translated to gram scale, which provides a practical method for the preparation of structurally diverse, enantiopure N-sulfonyl oxaziridines for use as reagents in organic synthesis.
Transacylation of N-acylsulfonamides, which replaces the N-acyl group with a new one, is a challenging and underdeveloped fundamental transformation. Herein, a general method for transacylation of N-acylsulfonamides is presented. The transformation is enabled by coincident catalytic reactivities of FeCl3 for nonhydrolytic deacylation of N-acylsulfonamides and subsequent acylation of the resultant sulfonamides
Sinomenine Derivatives and Preparation and Uses Thereof
申请人:Wang Jie
公开号:US20080318966A1
公开(公告)日:2008-12-25
The present invention relates to the preparation and pharmacological use of sinomenine derivatives of formula I. The approach disclosed herein is the modification of D ring by-substituting for R. Additional substitutions in the other rings are also provided herein. Several of the sinomenine derivatives have significantly greater anti-inflammation activity when compared with the parent compound.