New [4+1]-cycloadditions to trifluorinated dienes

被引：6

作者：

Abele, H ^{[1
]}

Haas, A ^{[1
]}

Lieb, M ^{[1
]}

Schelvis, M ^{[1
]}

机构：

[1] RUHR UNIV BOCHUM,LEHRSTUHL ANORGAN CHEM 2,D-44780 BOCHUM,GERMANY

来源：

JOURNAL OF FLUORINE CHEMISTRY | 1997年 / 84卷 / 01期

关键词：

addition of HBr; chalcogenophenes; 4+1]-cycloadditions; radical bromination; trifluoromethylated dienes;

D O I：

10.1016/S0022-1139(97)00033-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

2,2-Bis(trifluoromethyl)-4-methyl-2,5-dihydrothiophene (5), 2,2-bis(trifluoromethyl)-4-methyl-2,5-dihydroselenophene (6), 2-trifluoromethyl-2,4-dimethyl-2,5-dihydrothiophene (7) and 2-trifluoromethyl-2,4-dimethyl-2,5-dihydro (8) were prepared from 5,5,5-trifluoro-4-trifluoromethyl-2-methyl-penta-1,3-diene and 5,5,5-trifluoro-2,4-dimethyl-penta-1,3-diene by reaction with elemental sulphur or selenium. 5,5,5-Trifluoro-4-trifluoromethyl-pent-3-en-2 and 5,5,5 trifluoro-4-methvl-pent-3-en-2-one were treated with bromine and HBr. The 1,4-dibrominated products isolated did not undergo a metathesis reaction with K2S. (C) 1997 Elsevier Science S.A.

引用

页码：75 / 78

页数：4