Allenes. Part XI. The preparation of 3-alkyl- and 3,3-dialkyl-1-bromoallenes
作者:S. R. Landor、A. N. Patel、P. F. Whiter、P. M. Greaves
DOI:10.1039/j39660001223
日期:——
3-Alkyl- and 3,3-dialkyl-1-bromoallenes are prepared in excellent yield by the action of hydrobromic acid (45–50%) on secondary or tertiary acetylenic carbinols. They show an exceptionally intense band in the infrared region, a small maximum in the ultraviolet region above 210 mµ, and the expected n.m.r. long range spin–spin coupling.
通过氢溴酸(45%至50%)对仲或叔炔醇的作用,可以以极好的收率制备3-烷基和3,3-二烷基-1-溴代烯丙基。它们在红外区域显示出异常强烈的谱带,在210 m µ以上的紫外区域显示出很小的最大值,并且具有预期的nmr长程自旋-自旋耦合。