Synthesis of homopropargyl alcohols via insertion of allenyl carbenoids into acyclic organozirconium bonds
作者:Jozef Stec、Alan R. Henderson、Richard J. Whitby
DOI:10.1016/j.tetlet.2011.12.081
日期:2012.2
Insertion of allenyl carbenoids (3-tosyloxy-1-lithioalk-1-ynes) into organozirconium complexes gave allenyl-zirconocenes via a 1,2-zirconate rearrangement. Trapping of the allenyl-zirconium species with aldehydes and ketones gave, after hydrolysis, a series of homopropargyl alcohols. Enantioenriched products were prepared by insertion of the lithium carbenoid derived from (S)-but-3-yn-2-yl 4-toluenesulfonate
将烯基类胡萝卜素(3-甲苯磺酰氧基-1-硫代烷-1-炔)插入有机锆配合物中可通过1,2-锆酸酯重排得到烯基锆茂。水解后,用醛和酮捕获烯丙基锆物种,得到了一系列高炔丙醇。通过将衍生自4-甲苯磺酸(S)-丁-3-yn-2-基4-甲苯磺酸的类胡萝卜素锂插入烷基-和烯基-氯锆茂中来制备对映体富集的产物。