Synthesis of tetrahydroazocino- and dihydroazepino-1, 2-benzoquinones via amino-claisen rearrangement of 4- (2-vinyl - azetidino and aziridino)-1, 2-benzoquinones
作者:Loïk Viallon、Olivia Reinaud、Patrice Capdevielle、Michel Maumy
DOI:10.1016/0040-4039(95)00866-b
日期:1995.7
Amino-Claisen rearrangement of 4-(2-vinyl- azetidino or aziridino)-5-methoxy-1,2-benzoquinones 3a,b selectively gives rise to the new tetrahydroazocino — quinone 4a or dihydroazepino — quinone 4b respectively. Based on paramethoxyphenol as starting material, overall yields for the 3 steps synthesis of heterobicyclic quinones 4a,b are 58 and 52%.
4-(2-乙烯基-氮杂环丁烷基或叠氮基)-5-甲氧基-1,2-苯醌3a,b的氨基-克莱森重排分别选择性地产生了新的四氢偶氮c基-醌4a或二氢az庚基-醌4b。以对甲氧基苯酚为起始原料,三步合成杂双环醌4a,b的总产率分别为58%和52%。