Biginelli-like reaction with dialkyl acetone-1,3-dicarboxylates: a remarkable case of steric control
摘要:
A Biginelli-type condensation is described using dialkyl acetone-1,3-dicarboxylates as active methylene compounds for the preparation of monastrol analogues. Unexpectedly, the reaction with salicylaidehyde formed two different products depending on the ester alkyl group. This product dichotomy was found to be caused by the steric effects exerted by the alcohol terminus of the ester group in the active methylene component. Previous controversial results as to the structure of the Biginelli product 3 are also discussed. (c) 2008 Elsevier Ltd. All rights reserved.
Biginelli-like reaction with dialkyl acetone-1,3-dicarboxylates: a remarkable case of steric control
作者:Jan Sve˘tlík、Lucia Veizerová、Viktor Kettmann
DOI:10.1016/j.tetlet.2008.03.136
日期:2008.5
A Biginelli-type condensation is described using dialkyl acetone-1,3-dicarboxylates as active methylene compounds for the preparation of monastrol analogues. Unexpectedly, the reaction with salicylaidehyde formed two different products depending on the ester alkyl group. This product dichotomy was found to be caused by the steric effects exerted by the alcohol terminus of the ester group in the active methylene component. Previous controversial results as to the structure of the Biginelli product 3 are also discussed. (c) 2008 Elsevier Ltd. All rights reserved.