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Title: Diels-Alder reaction of pyran-2(H)-ones: Part VI—Preparation and investigation of the Diels-Alder reaction of 4,6-disubstituted thiopyran-2(H)-ones with 1,4-naphthoquinone and N-phenylmaleimide
Authors: Pai, Ruchira R
Bendre, Deven S
Samant, Shriniwas D
Issue Date: Jan-2002
Publisher: NISCAIR-CSIR, India
Abstract: 4,6-Disubstituted pyran-2(H)-ones 1 when treated with P2S5 the corresponding pyran-2(H)-thiones 2 are obtained. 2 on boiling in aq. methanol in the presence of Na2CO3 give the corresponding thiopyran-2(H)-ones 3. The mechanism for this reaction has been proposed, which is supported by the AM1 calculation results and the spectral data. The Diels-Alder reactions of 2 and 3 with N-phenylmaleimide and 1,4-naphthoquinone have been studied.
Page(s): 191-195
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.41B(01) [January 2002]

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