Synthesis and Antiallergic Activity of Dimethyl-2-(phenylcarbamoyl)ethylsulfonium p-Toluenesulfonate Derivatives
摘要:
The derivatives of dimethyl-2-(phenylcarbamoyl)ethylsulfonium p-toluenesulfonates were synthesized and evaluated for antiallergic activity. The 2,3-dihydroxyethoxy group was introduced to the phenyl ring from the standpoint of lipophilicity and electronic effects of substituent. The IgE-induced rat passive cutaneous anaphylaxis (PCA) was inhibited by oral administration of several substituted 2-[(4-propoxyphenyl)carbamoyl]ethyldimethylsulfonium p-toluenesulfonate derivatives. Among them (+/-)-2-[4-(3-ethoxy-2-hydroxypropoxy)phenyl]-carbamoyl]ethyldimethylsulfonium p-toluenesulfonate (1a, IPD-1151T) was found to possess considerable activity in the PCA test, and it was launched as Suplatast tosilate in Japan.
Selective C(sp<sup>3</sup>)–S Bond Cleavage of Thioethers to Build Up Unsymmetrical Disulfides
作者:Ke Yang、Yanqi Luo、Qingyue Hu、Mengjie Song、Junxiang Liu、Zhengyi Li、Bijin Li、Xiaoqiang Sun
DOI:10.1021/acs.joc.3c01355
日期:2023.10.6
The selective C(sp3)–S bond cleavage of thioethers was first developed to prepare unsymmetrical disulfides by using electrophilic halogenation reagents. In this strategy, NBS (N-bromosuccinimide) achieves selective furfuryl C(sp3)–S bond cleavage of furfuryl alkylthioethers at room temperature. Meanwhile, NFSI (N-fluorobenzenesulfonimide) enables selective methyl C(sp3)–S bond cleavage of aryl and