A novel stereo- and enantioselective synthesis of trans-9-alkyl-2-benzyl-5-methyl-6,7-benzomorphans
作者:Ali Dehghani、Xu Bai、S.Wayne Mascarella、Wayne D. Bowen、F.Ivy Carroll
DOI:10.1016/0040-4039(94)88402-1
日期:1994.11
The first stereo- and enantioselective syntheses of trans-9-alkyl-2-benzyl-5-methyl-6,7-benzomorphans (12) are described. The addition of alkyl magnesium halides to (R)-2-naphthyl-4-phenyl-1,3-oxazolidine (7) followed by treatment with iodomethane and quenching with acid gave (1S,2S)-2-alkyl-1-methyl-1,2-dihydronaphthalenecarboxaldehyde (10). Homologation of 10 followed by reductive amination using
描述了反式-9-烷基-2-苄基-5-甲基-6,7-苯并吗啡喃的第一立体和对映选择性合成(12)。向(R)-2-萘-4-苯基-1,3-恶唑烷(7)中添加烷基卤化镁,然后用碘代甲烷处理并用酸淬灭,得到(1S,2S)-2-烷基-1 -甲基-1,2-二氢萘甲醛(10)。10的同系化,然后使用苄胺进行还原胺化,得到(1 S,2 S)-反式-2-烷基-1-苄基氨基乙基-1-甲基-1,2-二氢萘(11)。乙酸汞辅助环化的11随后通过LAH还原得到(1 S,5 S,9 R)-12。