Sequential acetalization-pyrolysis of α-acetyl benzalacetones. A method for the generation of 6-substituted 2-acetonaphthones
作者:Joseph R. Zoeller
DOI:10.1016/s0040-4039(00)99489-9
日期:1989.1
6-Substituted 2-acetonaphthones can be generated from para substituted benzaldehydes and acetylacetone (2,4-pentanedione) in three reactions consisting of condensing the benzaldehyde with acetylacetone, acetalizing the resultant 3-benzylidene 2,4-pentanedione (α-acetyl benzalacetones), with trimethyl orthoformate, pyrolyzing the acetal either in the vapor phase at 475°C or by heating in a high boiling
可以由对位取代的苯甲醛和乙酰丙酮(2,4-戊二酮)在三个反应中生成6位取代的2-乙酰萘,包括将苯甲醛与乙酰丙酮缩合,缩醛化生成的3-苄叉基2,4-戊二酮(α-乙酰基苯丙酮) ,与原甲酸三甲酯一起在475°C的气相中或在高沸点溶剂(例如1-甲基萘)中加热将乙缩醛热解。