作者:Thierry Besson、Jérôme Guillard、Charles W. Rees、Valérie Thiéry
DOI:10.1039/a707801c
日期:——
cleaved by ethylmagnesium bromide in hot THF to give the corresponding isothiocyanates. The transformation 2→6→ArNCS can be performed as a ‘one-pot’ operation. The imines 2 are also converted, more slowly, into the isothiocyanates by sodium hydride in hot THF, via the cyanothioformanilides 6. Conversion of the anilides 6 into isothiocyanates is much faster under microwave irradiation in 2,6-lutidine. Mechanisms
伯芳族胺很容易转化为芳基-1,2,3-二噻唑2和衍生的氰基硫代甲酰苯胺6,两者在热THF中被乙基溴化镁迅速裂解,得到相应的异硫氰酸酯。转换2→6→ArNCS可以作为“一锅法”操作执行。在热THF中,通过氰基硫代甲酰苯胺6 ,氢化钠中的亚胺2也更缓慢地转化为异硫氰酸酯。在2,6-二甲基吡啶中在微波辐射下,苯胺6向异硫氰酸酯的转化要快得多。提出了用于这些反应的机制。