A new strategy for the preparation of secondary amines via o-(tetrahydropyranyloxymethyl)-benzamides
作者:Thomas Fichert、Ulrich Massing
DOI:10.1016/s0040-4039(98)00990-3
日期:1998.7
The new synthesis strategy for the preparation of secondary amines starts from N-alkyl-phthalimides which are reduced to the corresponding o-hydroxymethyl-N-alkyl-benzamides. After protection of the hydroxy group as tetrahydropyranyl ether the N-alkyl-benzamides are alkylated to o-(tetrahydropyranyloxymethyl)-N,N-dialkyl-benzamides. The deprotection of the hydroxy group and the release of the secondary
制备仲胺的新的合成策略从还原为相应的邻羟甲基-N-烷基苯甲酰胺的N-烷基邻苯二甲酰亚胺开始。在将羟基保护为四氢吡喃基醚之后,将N-烷基-苯甲酰胺烷基化为邻-(四氢吡喃基氧基甲基)-N,N-二烷基-苯甲酰胺。可以在一个使用乙酸水溶液的反应步骤中以优异的产率实现羟基的脱保护和仲胺的释放。