申请人:Sumitomo Chemical Company, Limited
公开号:US03953441A1
公开(公告)日:1976-04-27
A novel process for preparing 2-benzoylalkylbenzomorphan derivatives and salts thereof, represented by the formula ##SPC1## Wherein n, R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in the specification. The process comprises reacting a pyridinium derivative of the formula, ##SPC2## Wherein X is a halogen atom and Y' is an ethylenedioxy group; with a Grignard reagent of the formula, ##SPC3## Wherein R' is a hydrogen atom or a C.sub.1 -C.sub.3 alkoxy group and Z is a halogen atom, to yield a 1,2-dihydropyridine derivative of the formula; ##SPC4## And then reducing the said 1,2-dihydropyridine derivative to give a 1,2,5,6-tetrahydropyridine derivative of the formula, ##SPC5## Wherein Y is an oxygen atom or an ethylenedioxy group, and further cyclizing the obtained 1,2,5,6-tetrahydropyridine derivative.
一种制备2-苯甲酰基烷基苯并吗啡衍生物及其盐的新工艺,表示为以下公式:##SPC1## 其中n,R,R.sub.1,R.sub.2,R.sub.3和R.sub.4如规范中所定义。该工艺包括将以下公式的吡啶盐衍生物与以下公式的格氏试剂反应,##SPC2## 其中X是卤素原子,Y'是乙二氧基基团;得到以下公式的1,2-二氢吡啶衍生物:##SPC4## 然后还原所述的1,2-二氢吡啶衍生物以得到以下公式的1,2,5,6-四氢吡啶衍生物:##SPC5## 其中Y是氧原子或乙二氧基基团,并进一步使得所得的1,2,5,6-四氢吡啶衍生物环化。