Highly Chemo- and Enantioselective Cross-Benzoin Reaction of Aliphatic Aldehydes and α-Ketoesters
作者:Karen Thai、Steven M. Langdon、François Bilodeau、Michel Gravel
DOI:10.1021/ol400769t
日期:2013.5.3
highly chemo- and enantioselective cross-benzoin reaction between aliphatic aldehydes and α-ketoesters. This methodology represents the first high yielding and highly enantioselective intermolecular cross-benzoin reaction using an organocatalyst (up to 94% ee). Further diastereoselectivereduction of the products gives access to densely oxygenated compounds with high chemo- and diastereoselectivity.
Deoxygenative α-alkylation and α-arylation of 1,2-dicarbonyls
作者:Shengfei Jin、Hang T. Dang、Graham C. Haug、Viet D. Nguyen、Hadi D. Arman、Oleg V. Larionov
DOI:10.1039/d0sc03118f
日期:——
challenging but synthetically indispensable approach to α-branched carbonyl motifs that are widely represented among drugs, natural products, and synthetic intermediates. Here, we describe a simple approach to generation of boron enolates in the absence of strong bases that allows for introduction of both α-alkyl and α-aryl groups in a reaction of readily accessible 1,2-dicarbonyls and organoboranes. Obviation
Enantio- and Diastereoselective 1,2-Additions to α-Ketoesters with Diborylmethane and Substituted 1,1-Diborylalkanes
作者:Stephanie A. Murray、Jacob C. Green、Sanita B. Tailor、Simon J. Meek
DOI:10.1002/anie.201603465
日期:2016.7.25
The catalytic enantioselective synthesis of boronate‐substituted tertiary alcohols through additions of diborylmethane and substituted 1,1‐diborylalkanes to α‐ketoesters is reported. The reactions are catalyzed by readily available chiral phosphine/copper(I) complexes and produce β‐hydroxyboronates containing up to two contiguous stereogenic centers in up to 99:1 e.r. and greater than 20:1 d.r. The utility
Enantioselective vinylogous Mukaiyama aldol reaction of α-ketoesters under bifunctional organocatalysis
作者:Roberto del Río-Rodríguez、Víctor Laina-Martín、Jose A. Fernández-Salas、José Alemán
DOI:10.1039/d1cc04263g
日期:——
A highly enantioselective vinylogous Mukaiyama aldol reaction to ketoesters catalysed by a hydrogen-bond-donor-based bifunctional organocatalyst is presented. The addition of silyloxy dienol ether gives rise to multifunctional chiral tertiary alcohols bearing a versatile α,β-unsaturatedaldehyde with excellent enantiocontrol.
[EN] AMINOPYRIDOPYRAZINONE DERIVATIVES FOR TREATING NEURODEGENERATIVE DISEASES<br/>[FR] DÉRIVÉS D'AMINOPYRIDOPYRAZINONE POUR LE TRAITEMENT DE MALADIES NEURODÉGÉNÉRATIVES
申请人:LIGAND PHARM INC
公开号:WO2010008775A1
公开(公告)日:2010-01-21
Aminopyridopyrazinone derivatives useful in treating disorders that are mediated by adenosine receptor function, including neurodegenerative diseases and inflammation, are disclosed. Pharmaceutical compositions, methods of treatment and use, involving the disclosed compounds, are also disclosed.