Alkyne and Reversible Nitrile Activation:<i>N</i>,<i>N</i>′-Diamidocarbene-Facilitated Synthesis of Cyclopropenes, Cyclopropenones, and Azirines
作者:Jonathan P. Moerdyk、Christopher W. Bielawski
DOI:10.1021/ja3014105
日期:2012.4.11
diamidocyclopropenes by combining an isolable and readily accessible N,N'-diamidocarbene (DAC) with a range of alkynes (nine examples, 68-97% yield). Subsequent hydrolysis of selected cyclopropenes afforded the corresponding cyclopropenones or α,β-unsaturated acids, depending on the reaction conditions. In addition, the combination of a DAC with alkyl or aryl nitriles was found to form 2H-azirines in a reversible
我们报告了通过将可分离且易于获取的 N,N'-二氨基卡宾 (DAC) 与一系列炔烃(九个例子,68-97% 产率)相结合来合成各种二酰氨基环丙烯。根据反应条件,选定的环丙烯随后水解得到相应的环丙烯或 α,β-不饱和酸。此外,发现 DAC 与烷基或芳基腈的组合以可逆方式形成 2H-氮丙啶(四个例子,K(eq) = 4-72 M(-1) 在 30 °C 的甲苯中)。