Traceless Stereoinduction in the One-Pot Assembly of All Three Rings of Hexahydrodibenzopyrans
作者:Keith A. Korthals、William D. Wulff
DOI:10.1021/ja077579m
日期:2008.3.1
stereochemical information from the chiral center at the propargylic ether in the alkyne to the planar center of chirality in the in situ generated arene chromium tricarbonyl complexed intermediate and finally, after base-induced elimination to generate an o-quinone methide chromium tricarbonyl complexed intermediate, a transfer of chirality from the planar center of chirality in the o-quinone methide
已开发出一种用于合成六氢二苯并吡喃环系统的所有三个环的一锅法。该过程涉及串联序列,由烯基 Fischer 卡宾配合物和炔烃的苯环化反应组成,然后是消除反应,生成邻醌甲基铬三羰基配合物,最后是分子内杂原子 Diels-Alder 环加成。整个过程的立体诱导开始于将立体化学信息从炔烃中炔丙基醚的手性中心转移到原位生成的芳烃铬三羰基络合中间体的平面手性中心,最后在碱诱导消除后生成邻醌甲基铬三羰基络合中间体,