1-Aryl-1,3-diketones 4-7 were prepared by reaction of the corresponding 1-aryl-1,5-diketones 2b with piperidinium acetate in refluxing C6H6. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
Iminium salts derived from aromatic aldehydes react with alpha-chlorocarbanions via two different pathways: reaction with secondary carbanion of halomethyl sulfones proceeds as the Knoevenagel condensation, while tertiary alpha-chlorocarbanions gave products of vicarious nucleophilic substitution of hydrogen in parent aldehydes.
Synthesis of 1-Aryl-1,3-Diketones Containing the Dimethyl Malonate Moiety
作者:F. Jiménez-Cruz、L. A. Maldonado、R. Cetina、H. Ríos-Olivares
DOI:10.1080/00397910008086983
日期:2000.9
The synthesis of new 1,3-diketones malonates 3 a-j were prepared in good yield from 1,5-diketones 2 a-j by employing the 1,5 --> 1,3 diketone rearrangement.