Synthesis and reactions of 1,2,3,4,5,6-hexahydro-3,6-dimethyl-2,6-methano-3-benzazocin-11-one (2,5-dimethyl-9-oxo-6,7-benzomorphan); a new route to 3-benzazocines
作者:Brian Iddon、Donald Price、Hans Suschitzky、David I. C. Scopes
DOI:10.1039/p19830002583
日期:——
was converted into its ethyl (11) and methyl esters (12) and reduced to the 2-aminomethyl-3-benzazocine (13). An attempt to prepare the ethyl ester (11) in hot 10% aqueous ethanol saturated with hydrogen chloride resulted in ring contraction, to give 1-methyl-2-(N-methylaminomethyl)naphthalene (17). In a Pinner reaction in ethanol the benzazocine-2-carbonitrile (8) gave the corresponding amide (9) instead
在二阶贝克曼反应中,标题化合物(1)和1- [2-(N,N-二甲基氨基)乙基] -3,4-二氢-1-甲基萘-2(1 H)-一的肟(14)得到1,2,3,4-四氢-3,6-二甲基-3-苯甲唑啉-2-腈(8)和(E)-2- [邻-(2-氰乙基)苯基] -4-二甲基氨基丁-2 -ene(15)。将苯甲唑啉-2-腈(8)水解成相应的羧酸(10),将其转化成其乙基(11)和甲酯(12),并还原成2-氨基甲基-3-苯甲唑啉(13)。尝试在热的10%氯化氢饱和的乙醇水溶液中制备乙酯(11),导致环收缩,得到1-甲基-2-(N-甲基氨基甲基)萘(17)。在乙醇中的Pinner反应中,苯甲唑啉-2-腈(8)生成相应的酰胺(9)代替亚氨酸乙酯。