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Titolo:
CYCLIZATION REACTIONS OF HLORO-4-NITROPHENYLSULFONYL)-1-(2-THIENYL)ETHANONE
Autore:
FAN AL; CAO S; XU JH; ZHANG Z;
Indirizzi:
NANJING UNIV CHEM TECHNOL,DEPT APPL CHEM NANJING 210009 PEOPLES R CHINA
Titolo Testata:
Journal of heterocyclic chemistry
fascicolo: 2, volume: 35, anno: 1998,
pagine: 477 - 479
SICI:
0022-152X(1998)35:2<477:CROH>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
7
Recensione:
Indirizzi per estratti:
Citazione:
A.L. Fan et al., "CYCLIZATION REACTIONS OF HLORO-4-NITROPHENYLSULFONYL)-1-(2-THIENYL)ETHANONE", Journal of heterocyclic chemistry, 35(2), 1998, pp. 477-479

Abstract

A new sulfonyl group-containing heterocyclic compound hloro-4-nitrophenylsulfonyl)-1-(2-thienyl)ethanone 2 was prepared from the corresponding sulfide (2-chloro-4-nitrophenylthio)-1-(2-thienyl)ethanone 1. Two different cyclization reactions of the compound 2 were discussed. In contrast to the tandem alkylation-cyclization process [1], another cyclic procedure was described. In the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene as a base and dimethylformamide as a solvent, compound 2 was treated with ethyl acrylate or methyl methacrylate at 50-55 degreesto give the 1,4-benzoxathiin 4,4-dioxide 5 or 6 respectively via a tandem Michael conjugate addition-cyclization process.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 17:14:31