Propargyltrimethylsilanes as Allene Equivalents in Transition Metal-Catalyzed [5 + 2] Cycloadditions
作者:Paul A. Wender、Fuyuhiko Inagaki、Magnus Pfaffenbach、Matthew C. Stevens
DOI:10.1021/ol501114q
日期:2014.6.6
including metal-catalyzed [5 + 2] cycloadditions. We report herein that rhodium-catalyzed [5 + 2] cycloadditions of propargyltrimethylsilanes and vinylcyclopropanes provide, after in situ protodesilylation, a highly efficient route to formal allene cycloadducts. Propargyltrimethylsilanes function as safe, easily handled synthetic equivalents of gaseous allenes and hard-to-access monosubstituted allenes
Chiral Benzothiophene Synthesis via Enantiospecific Coupling of Benzothiophene S‐Oxides with Boronic Esters
作者:Ruocheng Sang、Adam Noble、Varinder K. Aggarwal
DOI:10.1002/anie.202112180
日期:2021.11.22
The C2 alkylation of functionalized benzothiophenes has been explored. Enantiospecific C−C bond formation is achieved via O-activation and 1,2-metalate shift of benzothiophene S-oxide boronate complexes, which enables expedient access to chiral C2-alkylated benzothiophenes.
Sulfoxide-directed metal-free cross-couplings in the expedient synthesis of benzothiophene-based components of materials
作者:Andrew J. Eberhart、Harry Shrives、Yuntong Zhang、Amandine Carrër、Adam V. S. Parry、Daniel J. Tate、Michael L. Turner、David J. Procter
DOI:10.1039/c5sc03823e
日期:——
A metal-free approach combining sulfoxide-directed metal-free C–H cross-couplings with tuneable heterocyclizations and dimerizations allows expedient access to important organic materials.
Propargylsilane and (trimethylsilyl)alkyne terminator groups. Formation of an exocyclic allene in the acetolysis of 8-(trimethylsilyl)-6-octyn-2-yl tosylate
作者:Aris D. Despo、Sai Keung Chiu、Timothy Flood、Paul E. Peterson