作者:Thierry Besson、Jérôme Guillard、Charles W. Rees、Michel Thérisod
DOI:10.1039/a700551b
日期:——
Treatment of N-arylimino-1,2,3-dithiazoles 2 with
ethylmagnesium bromide (2 equiv.) gives the corresponding aryl
isothiocyanates 13, providing a very mild two-step conversion of
ArNH
2
into ArNCS avoiding hazardous reagents; alternatively the
iminodithiazoles 2 can be converted into cyanothioformanilides 11 which
rapidly give the same isothiocyanates with 1 equiv. of the Grignard
reagent.
用溴化乙基镁(2当量)处理N-芳基亚胺-1,2,3-硫二唑2,可以得到相应的芳基异硫氰酸酯13,提供了一种非常温和的两步反应,将ArNH₂转化为ArNCS,避免了使用有害试剂;另外,亚胺硫二唑2还可以转化为氰硫酰胺11,这些化合物与1当量的格氏试剂迅速生成相同的异硫氰酸酯。