A More Comprehensive and Highly Practical Solution to Enantioselective Aldehyde Crotylation
摘要:
The enantioselective crotylation of aldehydes with 1,2-diaminochlorocrotylsilane reagents is effectively catalyzed by Sc(OTf)(3). The one significant limitation on the utility of these reagents - substrate scope - has thus been addressed. The net result is the most comprehensive and highly practical method for enantioselective aldehyde crotylation yet advanced.
COMPOSITIONS AND METHODS FOR STEREOSELECTIVE ALDEHYDE ALLYLATION AND CROTYLATION
申请人:KIM Hyunwoo
公开号:US20120190875A1
公开(公告)日:2012-07-26
Compositions and methods for practical, stereoselective allylation and crotylation for aldehyde substrates are described. The compositions and methods comprise reagents for allylation and/or crotylation and acids. In some embodiments, the reagents and acids are pre-mixed.
Tandem Silylformylation−Crotylsilylation/Tamao Oxidation of Internal Alkynes: A Remarkable Example of Generating Complexity from Simplicity
作者:Jared T. Spletstoser、Michael J. Zacuto、James L. Leighton
DOI:10.1021/ol802489w
日期:2008.12.18
The rhodium-catalyzed tandem silylformylation-crotylsilylation reaction has been extended to include internal alkynes. Tamao oxidation of the initial product leads to the production of a substituted enol, which undergoes highly diastereoselective tautomerization. The resulting one-pot procedure fashions three new stereocenters, a ketone, and a terminal alkene from a butenyl group, a propynyl group
铑催化的串联甲硅烷基甲酰化-巴豆基甲硅烷基化反应已扩展到包括内部炔烃。初始产物的 Tamao 氧化导致取代的烯醇的产生,该烯醇经历高度非对映选择性互变异构化。由此产生的一锅法由丁烯基、丙炔基、甲硅烷基氢化物、H2O2 和 CO 形成三个新的立体中心、一个酮和一个末端烯烃。
US8536360B2
申请人:——
公开号:US8536360B2
公开(公告)日:2013-09-17
Anchimeric assistance, rearrangement, and solvent addition in the formolysis of a nonconjugated acetylenic (homopropargylic) tosylate
作者:Joseph William Wilson
DOI:10.1021/ja01040a025
日期:1969.6
A More Comprehensive and Highly Practical Solution to Enantioselective Aldehyde Crotylation
作者:Hyunwoo Kim、Stephen Ho、James L. Leighton
DOI:10.1021/ja200712f
日期:2011.5.4
The enantioselective crotylation of aldehydes with 1,2-diaminochlorocrotylsilane reagents is effectively catalyzed by Sc(OTf)(3). The one significant limitation on the utility of these reagents - substrate scope - has thus been addressed. The net result is the most comprehensive and highly practical method for enantioselective aldehyde crotylation yet advanced.