Enantioselective Synthesis of Allylic Alcohols via an Oxazaborolidinium Ion Catalyzed Diels−Alder/Retro-Diels−Alder Sequence
作者:Simon Jones、Damien Valette
DOI:10.1021/ol902280d
日期:2009.11.19
A triflimide-activated oxazaborolidine catalyst successfully promoted the asymmetric Diels−Alder reaction of 9-methylanthracene with methacrolein in high regio- and enantioselectivity. The cycloadduct obtained was subsequently used as a chiral template to access secondary and tertiary allylic alcohols in good to high enantiomeric excess via a cycloreversion by flash vacuum pyrolysis.
Rhodium Carbenoid-Initiated Claisen Rearrangement: Scope and Mechanistic Observations
作者:John L. Wood、George A. Moniz
DOI:10.1021/ol990697x
日期:1999.8.1
alpha-diazoketones react with allylic alcohols in the presence of Rh(II) catalysts to furnish intermediate enols which subsequently undergo Claisen rearrangement to alpha-hydroxyketones. Herein we report (1) studies into the mechanism of this transformation which establish that Claisen rearrangement is neither rhodium- nor acid-catalyzed but a reaction intrinsic to the intermediate enols that proceeds at a rate
Development of a Rhodium Carbenoid-Initiated Claisen Rearrangement for the Enantioselective Synthesis of α-Hydroxy Carbonyl Compounds
作者:John L. Wood、George A. Moniz、Derek A. Pflum、Brian M. Stoltz、Alexandra A. Holubec、Hans-Jürgen Dietrich
DOI:10.1021/ja983294l
日期:1999.3.1
Stereoselective nitrile oxide cycloadditions to chiral allyl ethers and alcohols. The inside alkoxy effect
作者:K. N. Houk、Susan R. Moses、Yun Dong Wu、Nelson G. Rondan、Volker Jager、R. Schohe、Frank R. Fronczek
DOI:10.1021/ja00325a040
日期:1984.6
Optically active allylic tin reagent as an enantio-divergent synthon of isoprenoids via remote and divergent asymmetric induction
作者:Yutaka Nishigaichi、Hiroki Kuramoto、Akio Takuwa
DOI:10.1016/0040-4039(95)00539-o
日期:1995.5
(S)-2-(1-Hydroxymethyl)allyltin (1a) can be prepared in high enantiomeric purity. When its methylated and acetylated derivatives are allowed to add to aldehydes with the help of i-PrOTiCl3 and SnCl4, syn- and anti-homoallylic alcohols are stereoselectively obtained, respectively, via 1,4-asymmetric induction. These reactions are applied to the synthesis of the both enantiomers of a pheromone constituent, ipsenol, from a single enantiomer of 1a.