Selenium-stabilized anions. Preparation of .alpha.,.beta.-unsaturated carbonyl compounds using propargyl selenides. Synthesis of (.+-.)-7-hydroxymyoporone
(1<i>R</i>)-(+)-Camphor and Acetone Derived α′-Hydroxy Enones in Asymmetric Diels−Alder Reaction: Catalytic Activation by Lewis and Brønsted Acids, Substrate Scope, Applications in Syntheses, and Mechanistic Studies
作者:Patricia Bañuelos、Jesús M. García、Enrique Gómez-Bengoa、Ada Herrero、José M. Odriozola、Mikel Oiarbide、Claudio Palomo、Jesús Razkin
DOI:10.1021/jo9023039
日期:2010.3.5
enones as reaction partners of the Diels−Alder reaction are shown, with especial focus on their potentials and limitations in solving the above difficult cases. α′-Hydroxy enones are able to bind reversibly to bothLewisacids and Brønsted acids, forming 1,4-coordinated species that are shown to efficiently engage in these inherently difficult Diels−Alder reactions. On these bases, a convenient control
Selenium-stabilized anions. Preparation of .alpha.,.beta.-unsaturated carbonyl compounds using propargyl selenides. Synthesis of (.+-.)-7-hydroxymyoporone
作者:Hans J. Reich、Shrenik K. Shah、Paul M. Gold、Richard E. Olson