The Knoevenagel condensation of beta-ketothioesters with various aldehydes proceeds efficiently, affording the condensation products in moderate to good yield even in cases where the reactions of the corresponding beta-ketoesters give the adducts in only low to moderate yield. (C) 2002 Published by Elsevier Science Ltd.
Reaction of Corey Ylide with α,β-Unsaturated Ketones: Tuning of Chemoselectivity toward Dihydrofuran Synthesis
作者:Alexey O. Chagarovsky、Ekaterina M. Budynina、Olga A. Ivanova、Elena V. Villemson、Victor B. Rybakov、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1021/ol500877c
日期:2014.6.6
A straightforward, efficient, and reliable approach to synthetically valuable 2,3-dihydrofurans via a reaction between Corey ylide and α,β-unsaturated ketones has been developed. The use of simple and widely spread starting materials as well as mild reaction conditions and scalability provide a broad scope of 2,3-dihydrofurans.
A two step synthetic strategy for obtaining 2-alkenyl-1,3-dicarbonyl compounds from the corresponding 1,3-dicarbonyl compounds is reported. The method is based on a Knoevenagel condensation and a Michael addition using a high order organocuprate procedure, and proves to be of general value, Obtained compounds are useful starting materials for the synthesis of furan derivatives, (C) 2002 Elsevier Science Ltd. All rights reserved.
WO2007/131528
申请人:——
公开号:——
公开(公告)日:——
β-Ketothioester as a reactive Knoevenagel donor
作者:Yujiro Hayashi、Yuji Miyamoto、Mitsuru Shoji
DOI:10.1016/s0040-4039(02)00675-5
日期:2002.5
The Knoevenagel condensation of beta-ketothioesters with various aldehydes proceeds efficiently, affording the condensation products in moderate to good yield even in cases where the reactions of the corresponding beta-ketoesters give the adducts in only low to moderate yield. (C) 2002 Published by Elsevier Science Ltd.