Azomethine ylides derived from dichlorocarbene and O-acylsalicylaldehyde anils in the synthesis of 2,5-epoxy-2,3,4,5-tetrahydro-1,4-benzoxazepin-2-ones and 2-aminoethanols
作者:I. V. Voznyi、M. S. Novikov、A. F. Khlebnikov、R. R. Kostikov
DOI:10.1023/b:rucb.0000041304.68814.83
日期:2004.5
Iminiodichloromethanides generated by the reaction of O-acylsalicylaldehyde anils with dichlorocarbene undergo regioselective intramolecular 1,3-dipolar cycloaddition to the ester carbonyl group to give 2,5-epoxy-2,3,4,5-tetrahydro-1,4-benzoxazepin-2-ones. These compounds are expedient precursors for the synthesis of N-(2-hydroxybenzyl)ethanolamines.
由 O-酰基水杨醛 anils 与二氯卡宾反应生成的亚氨基二氯甲烷对酯羰基进行区域选择性分子内 1,3-偶极环加成,得到 2,5-epoxy-2,3,4,5-四氢-1,4-benzoxazepin- 2个。这些化合物是合成 N-(2-羟基苄基)乙醇胺的有利前体。