Selective Cross-Couplings. Sequential Stille−Liebeskind/Srogl Reactions of 3-Chloro-4-arylthiocyclobutene-1,2-dione
摘要:
The synthesis and initial reactivity studies of 2 are described. It was found that it participates in Stille couplings exclusively at the C-Cl site with a number of organostannanes (58-71% yield) in the absence of Cu(I). Then, these new derivatives were functionalized at the C-S site with boronic acids by switching to the Liebeskind-Srogi reaction conditions (in the presence of a Cu(l) carboxylate) to yield the bifunctionalized cyclobutenediones (44-90% yield).
Selective Cross-Couplings. Sequential Stille−Liebeskind/Srogl Reactions of 3-Chloro-4-arylthiocyclobutene-1,2-dione
摘要:
The synthesis and initial reactivity studies of 2 are described. It was found that it participates in Stille couplings exclusively at the C-Cl site with a number of organostannanes (58-71% yield) in the absence of Cu(I). Then, these new derivatives were functionalized at the C-S site with boronic acids by switching to the Liebeskind-Srogi reaction conditions (in the presence of a Cu(l) carboxylate) to yield the bifunctionalized cyclobutenediones (44-90% yield).
Selective Cross-Couplings. Sequential Stille−Liebeskind/Srogl Reactions of 3-Chloro-4-arylthiocyclobutene-1,2-dione
作者:Angélica Aguilar-Aguilar、Eduardo Peña-Cabrera
DOI:10.1021/ol701628z
日期:2007.10.1
The synthesis and initial reactivity studies of 2 are described. It was found that it participates in Stille couplings exclusively at the C-Cl site with a number of organostannanes (58-71% yield) in the absence of Cu(I). Then, these new derivatives were functionalized at the C-S site with boronic acids by switching to the Liebeskind-Srogi reaction conditions (in the presence of a Cu(l) carboxylate) to yield the bifunctionalized cyclobutenediones (44-90% yield).