Dynamic kinetic resolution of (S)-mandelate-derived α-bromo esters in nucleophilic substitution and asymmetric syntheses of 3-substituted morpholin-2-ones
作者:Yong Sun Park、Yoon Min Lee、Kyoung Hee Kang、Hye-Min Min、Hyun Jin Lim、Eun-Hyung Park
DOI:10.3998/ark.5550190.0011.201
日期:——
Dynamickineticresolution of (S)-mandelate-derivedα-bromoesters in nucleophilicsubstitution reaction has been investigated. Substitutions with various alkyl amine nucleophiles in the presence of TBAI and DIEA can provide various α-amino esters up to 81% yield and 97:3 dr. Also, the substitution of α-bromoesters with N-substituted 2-aminoethanol nucleophiles and following spontaneous cyclization
Treatment of emesis with morpholine tachykinin receptor antagonists
申请人:Merck & Co., Inc.
公开号:US05512570A1
公开(公告)日:1996-04-30
Substituted heterocycles of the structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma, emesis and nausea.
Process for preparing morpholine tachykinin receptor antagonists
申请人:Merck & Co., Inc.
公开号:US05637699A1
公开(公告)日:1997-06-10
Substituted heterocycles of the general structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
Morpholine compounds are prodrugs useful as tachykinin receptor
申请人:Merck & Co., Inc.
公开号:US05691336A1
公开(公告)日:1997-11-25
Substituted heterocycles of the general structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma, and emesis.
Direct Synthesis of <i>N</i>-Alkyl Arylglycines by Organocatalytic Asymmetric Transfer Hydrogenation of <i>N</i>-Alkyl Aryl Imino Esters
作者:Javier Mazuela、Thomas Antonsson、Magnus J. Johansson、Laurent Knerr、Stephen P. Marsden
DOI:10.1021/acs.orglett.7b02627
日期:2017.10.20
The organocatalytic asymmetrictransferhydrogenation of N-alkyl aryl imino esters for the direct synthesis of N-alkylated arylglycinate esters is reported. High yields and enantiomeric ratios were obtained, and tolerance to a diverse set of functional groups facilitated the preparation of more complex molecules as well as intermediates for active pharmaceuticals. A simple recycling protocol was developed