Synthesis of Benzo[e][1,3]thiazin‐4‐ones via PPh<sub>3</sub>‐Promoted Cyclization of Benzo[c][1,2]dithiol‐3‐ones and Amidines
作者:Xiaobing Liu、Wenxin Lv、Junjie Dong、Zekai Liu、Feng Hu、Chuncheng Zhou、Yao Zhou
DOI:10.1002/adsc.202301504
日期:——
A metal‐free cyclization of benzo[c][1,2]dithiol‐3‐ones and amidines is demonstrated herein. Triphenylphosphine was harnessed as the activating reagent to facilitate the ring‐opening of benzo[c][1,2]dithiol‐3‐ones via S‐S bond cleavage. This PPh3‐Promoted cyclization reaction of benzo[c][1,2]dithiol‐3‐ones enabled to forge a diverse array of 1,3‐benzothiazones in good yields with wide substrate scope
本文证明了苯并[c][1,2]二硫醇-3-酮和脒的无金属环化。利用三苯基膦作为活化剂,通过 S-S 键断裂促进苯并[c][1,2]二硫醇-3-酮的开环。这种 PPh3 促进的苯并[c][1,2]二硫醇-3-酮环化反应能够在温和条件下以良好的收率和广泛的底物范围形成多种 1,3-苯并噻腙。