High yield acyl anion trapping reactions: direct nucleophilic acylation of isocyanates and isothiocyanates.
作者:Dietmar Seyferth、Richard C. Hui
DOI:10.1016/s0040-4039(01)81576-8
日期:——
The reactions of t-BuLi, sec-BuLi and n-BuLi with CO in the presence of isothiocyanates and isocyanates gives, after hydrolytic work-up, α-oxothioamides, RC(O)C(S)NHR′, and α-oxoamides, RC(O)C(O)NHR′, respectively, in good yield. Competition from the direct reaction of RLi with the substrate is encountered only in the case of reactions of the n-BuLi/CO system with isocyanates.