Control of regioselectivity in the alkylation of 2-trimethylsilyl-2,5-dihydrothiophene 1,1-dioxide. A route for 2,2-dialkylation
作者:Hsi-Hwa Tso、Ta-Shue Chou、Wen-Cherng Lee
DOI:10.1039/c39870000934
日期:——
The readily available 2-trimethylsilyl-2,5-dihydrothiophene1,1-dioxide can be converted regioselectively into the dialkyl- and dispiro analogues, which are precursors of the corresponding 1,1-disubstituted buta-1,3-dienes and asymmetric dicycloalkylidenylethanes, respectively.
Regioselective substitution reactions of zinc sulfolenylates
作者:Ta-shue Chou、Hsien-Jung Tseng
DOI:10.1016/0040-4039(95)01508-f
日期:1995.9
Zincsulfolenylates 2a–c have been generated by metal exchange processes from lithiumsulfolenylate. These organozinc compounds show very interesting regioselectivity in the reactions with electrophiles.
Conversion of 2,5-dihydrothiophene 1,1-dioxides into highly functionalized (η<sup>4</sup>-buta-1,3-diene)tricarbonyliron(<scp>0</scp>) complexes
作者:Ming-Chang P. Yeh、Ta-Shue Chou、Hsi-Hwa Tso、Chung-Ying Tsai
DOI:10.1039/c39900000897
日期:——
Treatment of functionalized 2,5-dihydrothiophene 1,1-dioxides with nonacarbonyldi-iron in refluxing toluene affords functionalized (η4-buta-1,3-diene)tricarbonyliron(0) complexes.