Reactions of 4-dialkylamino-5-methoxy-1,2-benzoquinones in acidic media: Selective C-alkylation or N-dealkylation
作者:Loïk Viallon、Olivia Reinaud、Patrice Capdevielle、Michel Maumy
DOI:10.1016/0040-4020(96)00430-9
日期:1996.6
give rise to a stabilized carbonium ion, undergo selective acid-catalyzed rearrangements to 3-alkylated-1,2-benzoquinones 4. Aziridino-quinone 10c gives rise to the heterobicyclic 1,2-benzoquinone 11. When R1 does not contain groups capable of stabilizing a positive charge, efficient and selective N-dealkylations occur. The mechanisms of these reactions are discussed.
N烷基基团R 1可以产生稳定的碳离子的4-(N-甲基-烷基氨基)-5-甲氧基-1,2-苯醌3经历选择性的酸催化重排,生成3-烷基化-1 ,2-苯醌4。叠氮基醌10c产生杂双环1,2-苯醌11。当R 1不包含能够稳定正电荷的基团时,发生有效和选择性的N-脱烷基。讨论了这些反应的机理。