Solvent and in situ catalyst preparation impacts upon Noyori reductions of aryl-chloromethyl ketones: application to syntheses of chiral 2-amino-1-aryl-ethanols
摘要:
As part of medicinal chemistry efforts we found it necessary to develop general syntheses of highly enantiomerically enriched 1-aryl-2-chloroethanols and 1-aryl-2-methylaminoethanols. A survey of literature methods suggested that a truly general approach had not yet been reported, encouraging us to undertake the development of such a methodology. This study describes the design, development, and reduction to practice of a general synthesis of chiral 1-aryl-2-chloroethanols and the transformation of these entities to highly enantiomerically enriched 1-aryl-2-methylaminoethanols. Of particular importance were observations of the impact of solvent and the method of catalyst preparation on the yield and enantiomerical excess of chlorohydrins prepared via Noyori transfer hydrogenations of aryl-chloromethyl ketones. (c) 2006 Elsevier Ltd. All rights reserved.
[EN] PROCESS TO PRODUCE ENANTIOMERICALLY ENRICHED 1-ARYL- AND 1-HETEROARYL-2-AMINOETHANOLS<br/>[FR] PROCEDE DE PREPARATION D'1-ARYL- ET D'1-HETEROARYL-2-AMINOETHANOLS ENRICHIS EN ENANTIOMERES
申请人:UPJOHN CO
公开号:WO2004085414A1
公开(公告)日:2004-10-07
The invention relates to a method of preparing enantiomerically enriched amino alcohols of Formula (I) wherein the variable R1, R2, and R3 are defined herein.
Indium-mediated allylation reactions of α-chlorocarbonyl compounds and preparation of allylic epoxides
作者:Jeong Ah Shin、Kyung Il Choi、Ae Nim Pae、Hun Yeong Koh、Han-Young Kang、Yong Seo Cho
DOI:10.1039/b101111l
日期:——
Indium-mediatedallylation of α-chlorocarbonyl compounds with various allyl bromides in aqueousmedia gave the corresponding homoallylic chlorohydrins, which could be transformed into the corresponding epoxides in the presence of a base. These reactions were strongly dependent upon both the substituents at the carbon bearing chlorine and the allyl bromides used.
readily available N-(2-pyridyl)anilines and commercially available α-Cl ketones through iridium-catalyzed C–H activation and cyclization is reported here. As a complementary approach to the conventional strategies for indole synthesis, the transformation exhibits powerful reactivity, tolerates a large number of functional groups, and proceeds with good to excellent yields undermildconditions, providing
[EN] AROMATIC COMPOUNDS FROM FURANICS<br/>[FR] COMPOSÉS AROMATIQUES DÉRIVÉS DES FURANIQUES
申请人:NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
公开号:WO2017146581A1
公开(公告)日:2017-08-31
Described are methods for preparing phenols, benzene carboxylic acids, esters and anhydrides thereof from furanic compounds by reaction with a dienophile, wherein the furanic compounds are reacted with a hydrazine and/or oxime and then reacted with a dienophile.
COMPOSITIONS AND METHODS OF TARGETING MUTANT K-RAS
申请人:NantBioScience, Inc.
公开号:US20180086752A1
公开(公告)日:2018-03-29
Compounds and compositions are presented that inhibit K-ras, and especially mutant K-ras. Certain compounds preferentially or even selectively inhibit specific forms of mutant K-Ras, and particularly the G12D mutant form.