Transition Metal-Free Iodine-Catalyzed Denitrative C–S Cross-Coupling: An Atypical Route to Access Thiochromane Derivatives
作者:Anuradha Nandy、Govindasamy Sekar
DOI:10.1021/acs.joc.2c00425
日期:2022.6.3
extended for a three-component synthesis of thiochromenes via intermolecular C–S cross-coupling followed by aldol reaction. The reaction proceeds via activation of the keto group of chalcone through a halogen bond complex with iodine/denitrative C–S bond formation with xanthate/sulfa-Michael addition to chalcones. The methodology was also demonstrated for chemoselective reduction of chalcones. The protocol
已经开发了一种碘催化的脱硝 C-S 交叉偶联反应,以从 2'-硝基查耳酮和黄原酸盐中获得硫色酮。该策略被扩展为通过分子间 C-S 交叉偶联和醛醇反应合成三组分硫色素。该反应通过与碘/脱硝的 C-S 键形成的卤素键络合物活化查尔酮的酮基而进行,黄原酸盐/磺胺-迈克尔加成到查尔酮上。该方法也被证明可用于化学选择性还原查尔酮。该协议还用于合成生物学上重要的 3'-羟基硫黄酮和硫色素酮。