N-Heterocyclic Carbene Organocatalysts for Dehydrogenative Coupling of Silanes and Hydroxyl Compounds
作者:Dongjing Gao、Chunming Cui
DOI:10.1002/chem.201301893
日期:2013.8.19
Go organic! N‐Heterocyclic carbene (NHC) 1,3‐diisopropyl‐4,5‐dimethylimidazol‐2‐ylidene (IiPr) has been found to be an efficient and selective catalyst for the dehydrogenativecoupling of a wide range of silanes and hydroxyl groups to form SiO bonds under mild and solvent‐free conditions (see scheme). Mechanistic studies indicated that the activation of hydroxyl groups by the NHC is the most plausible
Versatile Dehydrogenative Alcohol Silylation Catalyzed by Cu(I)−Phosphine Complex
作者:Hajime Ito、Akiko Watanabe、Masaya Sawamura
DOI:10.1021/ol050559+
日期:2005.4.1
[reaction: see text] Cu(I) complexes of xanthane-based diphosphines were versatile catalysts for dehydrogenative alcohol silylation, exhibiting high activity and broad substrate scope. Highlyselectivesilylation of 1-decanol over 2-decanol is possible even with a silylating reagent of small steric demand such as HSiMe(2)Ph or HSiEt(3).
Synthesis of the C1-C14 Fragment of Sarcoglaucol-16-one via Z-Selective Ando-Type Horner-Wadsworth-Emmons Olefination
作者:Sabine Laschat、Christoph Gastl
DOI:10.1055/s-0029-1218825
日期:2010.8
A synthetic strategy involving a Z-selective Horner-Wadsworth-Emmons olefination was developed for the preparation of the sarcoglaucolone precursor methyl (2Z,6E)-8-(methoxymethoxy)-6-methyl-2-[(3E)-4-methyl-5-oxopent-3-enyl]-9-[(trimethylsilyl)methyl]deca-2,6,9-trienoate. The target compound was isolated in a E/Z ratio of 17:83