Divergent Total Synthesis of Triptolide, Triptonide, Tripdiolide, 16-Hydroxytriptolide, and Their Analogues
作者:Hongtao Xu、Huanyu Tang、Huijin Feng、Yuanchao Li
DOI:10.1021/jo501744j
日期:2014.11.7
for the formal total synthesis of triptolide, triptonide, and tripdiolide, as well as a total synthesis of 16-hydroxytriptolide and their analogues in an enantioselective form. Common advanced intermediate 5 was concisely assembled by employing an indium(III)-catalyzed cationic polycyclization reaction and a palladium-catalyzed carbonylation–lactone formation reaction as keysteps. This advanced intermediate
1-Methyl-1-vinyl- and 1-Methyl-1-(prop-2-enyl)silacyclobutane: Reagents for Palladium-Catalyzed Cross-Coupling Reactions of Aryl Halides
作者:Scott E. Denmark、Zhigang Wang
DOI:10.1055/s-2000-6292
日期:——
1-Methyl-1-vinylsilacyclobutane (1) and 1-methyl-1-(prop-2-enyl)silacyclobutane (2) undergo rapid and high yielding cross-coupling with aromatic halides. Many different substituents and patterns on the aromatic moiety are tolerated. All reactions can be run at room temperature and require the presence of tetrabutylammonium fluoride and Pd(dba)2. Both silacyclobutanes can be made in one step from commercially available precursors.