ENANTIOSELECTIVE CROSS ALDOL REACTION VIA DIVALENT TIN ENOLATE
作者:Nobuharu Iwasawa、Teruaki Mukaiyama
DOI:10.1246/cl.1982.1441
日期:1982.9.5
Highly enantioselective cross aldolreaction between aromatic ketones and various aldehydes is achieved via divalent tinenolates employing chiral diamines derived from (S)-proline as ligands.
Development of Asymmetric Reactions Catalyzed by Chiral Organotin-Alkoxide Reagents
作者:Akira Yanagisawa、Kazuhiro Yoshida
DOI:10.1002/tcr.201200019
日期:2013.2
of an alcohol. In this Personal Account, we describe three types of asymmetric transformation that proceed through a chiral tin enolate: 1) The asymmetric aldol reaction of alkenyl esters or unsaturated lactones with aldehydes or isatins; 2) the asymmetric three-componentMannich-typereaction of alkenyl esters and related cycloaddition reactions; and 3) the asymmetric N-nitroso aldol reaction of unsaturated
Methanol-Assisted Catalysis by Chiral Tin Methoxides: An Alternative Asymmetric Aldol Process
作者:Akira Yanagisawa、Tomoya Satou、Atsuto Izumiseki、Youichi Tanaka、Masahiko Miyagi、Takayoshi Arai、Kazuhiro Yoshida
DOI:10.1002/chem.200901822
日期:2009.11.2
Opening a tin of catalysts: A catalytic enantioselective aldol reaction of alkenyl trichloroacetates with aldehydes was achieved using a (S)‐BINOL‐derived chiral organotin(IV) dibromide possessing a 4‐tert‐butylphenyl group at the 3‐ and 3′‐position as a chiral pre‐catalyst in the presence of sodium methoxide and methanol (see scheme).
Highly Diastereoselective Reformatsky-Type Reaction Promoted by Tin Iodide Ate Complex
作者:Ikuya Shibata、Toshihiro Suwa、Hideaki Sakakibara、Akio Baba
DOI:10.1021/ol0171214
日期:2002.1.1
GRAPHICSAn ate type of tin complex, Li+[n-Bu2SnI3](-)/HMPA, works as a novel type of reagent to accomplish the highly diastereoselective Reformatsky-type reaction by the halogen-metal exchange method.
Lanthanide ion assisted electrochemically initiated aldol condensations