Fused thiazinoimidazole synthesis from the sulfur‐ and selenium‐substituted propargylalcohols with 2‐mercaptoimidazoles were reported. The protocol is utilized for [3+3] annulation reactions of a wide variety of propargylalcohols with three types of 2‐mercaptoimidazoles. The reactions were regioselective, atom economical, and versatile. Further transmetalation and the successive hydration and alkylation
Scandium-Catalyzed Carbon−Carbon Bond-Forming Reactions of 3-Sulfanyl- and 3-Selanylpropargyl Alcohols
作者:Mitsuhiro Yoshimatsu、Tokutaro Otani、Saki Matsuda、Teruhisa Yamamoto、Arisa Sawa
DOI:10.1021/ol801533p
日期:2008.10.2
The scandium-catalyzed substitution reactions of the phenylsulfanyl and phenylselanyl propargyl alcohols 3a-i and 7a-h regioselectively proceeded to give the propargylated compounds 4 and 8 in high yields.