Catalytic Addition Methods for the Synthesis of Functionalized Diazoacetoacetates and Application to the Construction of Highly Substituted Cyclobutanones
作者:Michael P. Doyle、Kousik Kundu、Albert E. Russell
DOI:10.1021/ol052003s
日期:2005.11.1
[reaction: see text] Methyl 3-(trialkylsilanyloxy)-2-diazo-3-butenoate undergoes Lewis acid-catalyzed Mukaiyamaaldol addition with aromatic and aliphatic aldehydes in the presence of low catalytic amounts of Lewis acids in nearly quantitative yields. Scandium(III) triflate is the preferred catalyst and, notably, addition proceeds without decomposition of the diazo moiety. Diazoacetoacetate products
Tandem catalysis: Direct catalytic synthesis of imines from alcohols using manganese octahedral molecular sieves
作者:S SITHAMBARAM、R KUMAR、Y SON、S SUIB
DOI:10.1016/j.jcat.2007.11.006
日期:2008.1.25
Tandem processes involving catalysts can offer unique and powerful strategies for converting simple starting materials into more complex products in a single reaction vessel. Imines were synthesized directly from alcohols via a tandem catalytic process using manganese octahedral molecular sieves (OMS-2) as catalyst. The synthesis proceeds through two steps: an oxidation of the alcohols to carbonyls
Method for isolating an intestinal cholesterol binding protein
申请人:——
公开号:US20040126812A1
公开(公告)日:2004-07-01
The invention describes a method for isolating an intestinal protein which is able to bind cholesterol and/or cholesterol uptake inhibitors. Methods of identifying inhibitors of cholesterol uptake and related pharmaceuticals and methods of treatment also are described.
METHOD FOR ISOLATING AN INTESTINAL CHOLESTEROL BINDING PROTEIN
申请人:KRAMER Werner
公开号:US20080167451A1
公开(公告)日:2008-07-10
The invention describes a method for isolating an intestinal protein which is able to bind cholesterol and/or cholesterol uptake inhibitors.
本发明描述了一种分离肠道蛋白的方法,该蛋白能够结合胆固醇和/或胆固醇摄取抑制剂。
Highly Selective Catalyst-Directed Pathways to Dihydropyrroles from Vinyldiazoacetates and Imines
作者:Michael P. Doyle、Ming Yan、Wenhao Hu、Luisa S. Gronenberg
DOI:10.1021/ja029745q
日期:2003.4.1
Copper-catalyzed reactions of vinyldiazoacetates with imines occur via a pathway in which the activated imine undergoes electrophilic addition to the vinyldiazo compound, whereas reactions catalyzed by rhodium(II) proceed through a metal carbene to an intermediate iminiumylide. Both pathways exhibit high stereoselectivities.