One‐pot synthesis of 2‐imino‐1,3,4‐thiadiazolines from acylhydrazides and isothiocyanates
作者:Su Been Kim、Sang Eun Baek、Jae Hyeok Lim、Jinho Kim
DOI:10.1002/bkcs.12585
日期:2022.8
A one-pot synthesis of 2-imino-1,3,4-thiadiazolines was successfully achieved under mild conditions. The developed synthesis involves Fe(Pc)-catalyzed aerobic oxidation of acylhydrazides followed by P(NMe2)3-mediated annulation of the in situ generated N-acyldiazene with isothiocyanates. The present annulation showed broad substrate scope with good functional group tolerance, and was effective on gram
在温和条件下成功实现了 2-亚氨基-1,3,4-噻二唑啉的一锅法合成。开发的合成包括 Fe(Pc) 催化的酰肼有氧氧化,然后是 P(NMe 2 ) 3介导的原位产生的N-酰基二氮烯与异硫氰酸酯的环化。本发明的环化显示出广泛的底物范围和良好的官能团耐受性,并且在克级上是有效的。