作者:Rik Tykwinski、Thanh Luu、Yasuhiro Morisaki
DOI:10.1055/s-2007-1000937
日期:——
one-pot, two-step method for the synthesis of diynes and triynes is reported. The reaction of a dibromoolefinic precursor with BuLi effects a Fritsch-Buttenberg-Wiechell rearrangement and generates a lithium acetylide intermediate, which is then trapped with a variety of electrophiles to produce substituted diynes and triynes. Alternatively, transmetalation from the lithium acetylide to give a zinc acetylide
报道了一种合成二炔和三炔的一锅两步法。二溴烯烃前体与 BuLi 的反应会产生 Fritsch-Buttenberg-Wiechell 重排并生成乙炔锂中间体,然后用各种亲电子试剂捕获该中间体以产生取代的二炔和三炔。或者,从乙炔锂的金属转移得到乙炔锌为芳基碘化物在钯存在下通过根岸偶联形成对称或不对称的二炔和三炔提供了亲核偶联配偶体。