Allenes. Part XX. The preparation of 3-alkyl- and 3,3-dialkylallenenitriles
作者:P. M. Greaves、S. R. Landor、D. R. J. Laws
DOI:10.1039/j39680000291
日期:——
3-Alkyl- and 3,3-dialkylallenecarbonitriles are conveniently prepared in good yield from 1-alkyl and 1,1-dialkyl-3-bromoallenes by the action of cuprous cyanide in NN-dimethylformamide at 35–60° for 2 hours. Tertiary acetylenic alcohols may be directly converted into 3,3-dialkylallenecarbonitriles by stirring for 3 days with potassium cyanide, cuprous cyanide, and hydrobromic acid. The same mixture
3 -烷基-和3,3- dialkylallenecarbonitriles便利地以良好的收率由在氰化亚铜的作用制备由1-烷基和1,1-二烷基-3- bromoallenes NN二甲基甲酰胺在35-60℃下2小时。通过与氰化钾,氰化亚铜和氢溴酸搅拌3天,可以将叔炔醇直接转化为3,3-二亚烷基丙烯腈。具有大量过量浓盐酸的相同混合物产生几乎等量的氯代和氰基-烯基。