Synthetic entry to dibenzo[b,f]oxinin and dibenzo[b,f] azonine derivatives through a dibenzo[a,e]cycloocten-5-one
作者:I. Wesley Elliott、Milton J. Sloan、Earl Tate
DOI:10.1016/0040-4020(96)00390-0
日期:1996.6
e]cycloocten-5-one (2) was transformed by Baeyer-Villiger oxidation to the substituted 6-oxodibenzo[b,f]oxinin 6. One-pot Beckmann or Schmidt rearrangements of 2 afforded the 6-oxodibenzo[b,f]-azonine 8 which was reduced by BH3-THF to the tricyclic amine 14. Parallel reactions with desoxyveratroin gave the ester 7 or amide 12 from preferential migration of the 3,4-dimethoxyphenyl over the 3,4-dimethoxybenzyl
通过Baeyer-Villiger氧化法将2,3,8,9-四甲氧基-5,6,11,12-四氢二苯并[ a,e ]环辛烯-5-一个(2)转化为取代的6-氧二苯并[ b,f ]毒素6。一锅贝克曼或施密特重排2提供了6- oxodibenzo [ b,f ] -azonine 8,它被BH 3 -THF还原为三环胺14。与脱氧维他汀的平行反应由于3,4-二甲氧基苯基优先于3,4-二甲氧基苄基迁移而产生了酯7或酰胺12。