Iron(II)-promoted rearrangement of 1,4-diaryl-2,3-dioxabicyclo[2.2.2]oct-5-enes: a mechanism distinct from that postulated previously
作者:Masaki Kamata、Chika Satoh、Hye-Sook Kim、Yusuke Wataya
DOI:10.1016/s0040-4039(02)02024-5
日期:2002.11
Reactions of 1,4-diaryl-2,3-dioxabicyclo[2.2.2]oct-5-enes 1a–c (1a: Ar=p-FC6H4, 1b: Ar=C6H5, 1c: Ar=p-MeC6H4) with FeBr2 afforded syn-1,2;3,4-bis(epoxy)-1,4-diarylcyclohexanes 4a–c and cis-3,6-diaryl-2,3-epoxycyclohexanones 5a–c as major products instead of the previously reported 1-aroyl-3-aryl-2,3-epoxycyclopentanes 2a–c.
1,4-二芳基-2,3-二氧杂二环的反应[2.2.2]辛-5-烯类1A - Ç(1A:Ar为p -FC 6 ħ 4,1B:氩= C 6 H ^ 5,1C:氩= p -MeC 6 ħ 4)与FeBr 2,得到顺式-1,2-; 3,4-双(环氧)-1,4- diarylcyclohexanes 4A - ç和顺-3,6-二芳基-2,3- epoxycyclohexanones 5A – c为主要产品,而不是先前报道的1-芳基-3-芳基-2,3-环氧环戊烷2a – c。