An alkoxide-directed alkyne–allene cross-coupling for stereoselective synthesis of 1,4-dienes
作者:Heidi L. Shimp、Glenn C. Micalizio
DOI:10.1039/b708256h
日期:——
A titanium alkoxide-mediated convergent coupling between internal alkynes and allenes is described for the regio- and stereocontrolled synthesis of substituted acyclic 1,4-dienes.
Allene–alkyne cross-coupling for stereoselective synthesis of substituted 1,4-dienes and cross-conjugated trienes
作者:Heidi L. Shimp、Alissa Hare、Martin McLaughlin、Glenn C. Micalizio
DOI:10.1016/j.tet.2008.02.015
日期:2008.4
Titanium-mediated cross-coupling of allenic alcohols with alkynes has been investigated. Divergent reaction pathways were discovered that provide either stereodefined 1,4-dienes or substituted cross-conjugated trienes. In short, allene substitution plays a critical role in the determination of reaction pathway.