Reaction of lithiated senecioamide and related compounds with benzynes : Efficient syntheses of naphthols and naphthoquinones.
作者:MITSUAKI WATANABE、SADAYOSHI HISAMATSU、HIROSHI HOTOKEZAKA、SUNAO FURUKAWA
DOI:10.1248/cpb.34.2810
日期:——
The reaction of lithated N, N-diethylsenecioamide and N, N-diethy-3-phenlisocrotonamide with methoxy-substituted benzynes, generated in situ from methoxy-substituted halobenzenes, gave regiospecifically various 3-methyl- and 3-phenyl-naphthol derivatives in a one-pot process. Methoxy-substituted 3-methyl-1-naphthols thus obtained were easily converted into various 1, 4-naphthoquinones and 1, 2-naphthoquinones including biologically active natural products such as plumbagin, plumbagin methylether, 5, 6-dimethoxy-2-methyl-1, 4-naphthoquinone, and 8-methoxy-3-mathyl-1, 2-naphthoquinone.
锂化的N,N-二乙基硒次酰胺和N,N-二乙基-3-苯基异巴豆酰胺与甲氧基取代的苯炔反应,这些苯炔是通过甲氧基取代的卤代苯现场生成的,从而在一个锅中特异性地合成了各种3-甲基和3-苯基萘酚衍生物。由此获得的甲氧基取代的3-甲基-1-萘酚很容易转化为各种1,4-萘醌和1,2-萘醌,包括具有生物活性的天然产物,如白花丹素、白花丹素甲醚、5,6-二甲氧基-2-甲基-1,4-萘醌和8-甲氧基-3-甲基-1,2-萘醌。