Synthesis of 2-Phenyl- and 2,2-Diarylpyrrolidines through Stevens Rearrangement Performed on Azetidinium Ions
作者:Bruno Drouillat、Edouard d'Aboville、Flavien Bourdreux、François Couty
DOI:10.1002/ejoc.201301536
日期:2014.2
atom either by a benzyl group or a benzhydryl group were synthesized to delineate the scope of their ring expansion into 2-phenyl- or 2,2-diaryl-pyrrolidines through a Stevens rearrangement. Whereas the regioselectivity of the rearrangement is very high, the diastereoselectivity is low when 2,3-disubstituted pyrrolidines are produced, except in one case. The major undesirable side-reaction is a Hofmann
合成了一组在氮原子上被苄基或二苯甲基取代的氮杂环丁烷离子,以通过史蒂文斯重排描绘出它们扩环成 2-苯基-或 2,2-二芳基-吡咯烷的范围。尽管重排的区域选择性非常高,但在生成 2,3-二取代吡咯烷时,非对映选择性很低,但在一种情况下除外。主要的不希望有的副反应是导致环断裂的霍夫曼消除。