An innovative approach to the synthesis of substituted benzaldehydes through carbanion induced ring transformation of suitably functionalized 2 H -pyran-2-ones
摘要:
An innovative route for the synthesis of substituted benzaldehydes has been delineated through a ring transformation reaction of suitably functionalized 2H-pyran-2-ones by methylglyoxaldimethylacetal followed by Amberlyst 15 or acid catalyzed cleavage of the intermediate acetal in good yield. (C) 2004 Published by Elsevier Ltd.
Synthesis of Benzocyclobutanes through Ring Transformation Reactions of 2<i>H</i>-pyran-2-ones
作者:Vishnu Ji Ram、Diptesh Sil、Ashoke Sharon、Ramendra Pratap、Prakas R. Maulik
DOI:10.1055/s-2004-831292
日期:——
A one-pot synthesis of benzocyclobutane (3a-n) has been developed through base-induced ring transformation reactions of 6-aryl-4-substituted-2H-pyran-2-one-3-carbonitriles (1a-c) and methyl 6-aryl-4-methylsulfanyl-2H-pyran-2-one-3-carboxylate (1d) by cyclobutanone.
An efficient synthesis of 4H,5H-pyrano[3,4-c]pyran-4,5-diones from a suitably functionalized 2H-pyran-2-one
作者:Diptesh Sil、Vishnu Ji Ram
DOI:10.1016/j.tetlet.2004.09.045
日期:2004.10
An efficient synthesis of ethyl 7-aryl-2-methyl-4H,5H-pyrano[3,4-c]pyran-4,5-dione-1-carboxylate 5, and ethyl 6-aryl-3-cyano-2H-pyran-2-one-4-acetate 6 has been delineated by reaction of suitably functionalized 2H-pyran-2-ones 1 with ethyl acetoacetate 2. (C) 2004 Elsevier Ltd. All rights reserved.