Oxidation of 2-(4-chlorobenzoyl)-thiophene into 1-oxide Diels-Alder dimers, sesquioxide and a sulfone-water adduct.

被引:7
|
作者
Ho, MT [1 ]
Treiber, A [1 ]
Dansette, PM [1 ]
机构
[1] Univ Paris 05, Chim & Biochim Pharmacol & Toxicol Lab, CNRS, URA 400, F-75270 Paris 06, France
关键词
thiophene; oxidation; peracid; dioxirane;
D O I
10.1016/S0040-4039(98)01004-1
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Oxidation of 4-chlorophenyl, thien-2-yl-methanone 1 with 0.2 eq H2O2 in TFA gave the 1-oxide Diels-Alder dimer 3a. Use of an 1-5 eq H2O2 afforded the sesquioxide 4 (4,7 di [4-chlorobenzoyl]-3,10-dithiatricyclo [5.2.1.0(2,6)] deca-4,8-diene 3,3,10-trioxide). Oxidation of 1 with mCPBA in CH2Cl2-excess BF3-etherate gave 3a (4,7-di [4-chlorobenzoyl]-3,10-dithiatricyclo [5.2.1.0(2,6)] deca-4,8-diene 3,10-dioxide) in acceptable yield and the minor isomer 3b in low yield. Oxidation of 1 with 6 eq dimethyldioxirane in acetone gave 3-hydroxy 2,3-dihydrothiophene 1,1-dioxide 6, a 1,1-dioxide-water adduct. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:5049 / 5052
页数:4
相关论文
共 3 条