Catalytic (3 + 2) umpolung annulations of α-thioacyl carbenes with aryl isothiocyanates
作者:Ziyang Dong、Meng-Yao Ma、Jiaxi Xu、Zhanhui Yang
DOI:10.1039/d2cc02882d
日期:——
1,2,3-Thiadiazoles serve as masked S-electrophilic thia-1,3-dipoles. Under rhodium/racemic BINAP catalysis, they undergo denitrogenative (3 + 2) umpolung transannulations with aryl isothiocyanates with inverse regioselectivity and excellent stereoselectivity, yielding N-aryl 3H-1,2-dithiol-(Z)-3-imines in a redox-neutral, step-efficient, and functionality-tolerant manner. An intramolecular S–S bond
1,2,3-噻二唑用作掩蔽的 S-亲电 thia-1,3-偶极子。在铑/外消旋 BINAP 催化下,它们与异硫氰酸芳基酯进行脱氮 (3 + 2) umpolung 环环化反应,具有反向区域选择性和出色的立体选择性,在氧化还原反应中生成N-芳基 3 H -1,2-二硫醇-( Z )-3-亚胺- 中性、高效和功能宽容的方式。分子内的 S-S 键令人印象深刻。