作者:Michitaka Kurimoto、Daisuke Nakajima、Yoshitake Nishiyama、Satoshi Yokoshima
DOI:10.1002/ejoc.202000355
日期:2020.7.23
novel semipinacol rearrangement using dibromocyclopropanes as sources of carbocations was developed. Heating dibromocyclopropanes bearing a 1‐hydroxyalkyl group with silver perchlorate and 2,6‐lutidine induced cleavage of the cyclopropane ring to form allyl cations, which underwent 1,2‐shift of a substituent at the α‐position of the hydroxy group to give β,γ‐unsaturated carbonyl compounds having a quaternary
开发了使用二溴环丙烷作为碳正离子来源的新型频哪醇重排。用高氯酸银和2,6-二甲基吡啶加热带有1-羟烷基的二溴环丙烷诱导的环丙烷环裂解形成烯丙基阳离子,然后在羟基的α-位进行1,2-取代基移位,得到β ,γ-不饱和羰基化合物,在α-位置具有季碳。