Regioselective synthesis of 3-acylated 2,5-dihydrothiophene S,S-dioxides via ultrasound-promoted allylzincation of 3-bromo-2,3-dihydrothiophene S,S-dioxide
作者:Hsi-Hwa Tso、Ta-shue Chou、Su Chun Hung
DOI:10.1039/c39870001552
日期:——
3-Acylated2,5-dihydrothiopheneS,S-dioxides were synthesized from 3-hydroxyalkylated 2,3-dihydrothiophene S,S-dioxides, prepared highly regioselectivelyviaultrasound-promotedallylzincation of 3-bromo-2,3-dihydro-thiophene S,S-dioxide.
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.
The Effect of Lithium Ion on the Regioselectivity of Substitution Reactions of Zinc Sulfolenylate
作者:Ta-Shue Chou、Chin-Jyh Chang
DOI:10.1002/jccs.199800079
日期:1998.8
AbstractThe addition of lithium cation to zinc sulfolenylates significantly changes the regioselectivity of its reaction toward carbonyl electrophiles. The more lithium salt is added, the more the reactions prefer to take place at the α‐position of the sulfolenylate.
TSO, HSI-HWA;CHOU, TA-SHUE;HUNG, SU CHUN, J. CHEM. SOC. CHEM. COMMUN.,(1987) N 20, 1552-1553
作者:TSO, HSI-HWA、CHOU, TA-SHUE、HUNG, SU CHUN
DOI:——
日期:——
YAMADA SACHIKO; SUZUKI HIROMASA; NAITO HIROYUKI; NOMOTO TAKASHI; TAKAYAMA+, J. CHEM. SOC. CHEM. COMMUN.,(1987) N 5, 332-333