Stereoselective synthesis of 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-1,4-oxazine
摘要:
A convenient process for the preparation of the secondary amine 6, 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-1,4-oxazine, is described starting from the readily available (S)-phenylglycine 1. The process features efficient construction of the homochiral oxazinone intermediate 3 and stereoselective introduction of the 2-(3,5-bis(trifluoromethyl)-benzyloxy) group by L-Selectride reduction followed by in situ alkylation with the highly reactive 3,5-bis(trifluoromethyl)-benzyl triflate 4. (C) 1997 Elsevier Science Ltd.
Morpholine and thiomorpholine tachykinin receptor antagonists
申请人:Merck & Co., Inc.
公开号:US05872116A1
公开(公告)日:1999-02-16
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.
Catalytic Enantioselective Synthesis of Morpholinones Enabled by Aza-Benzilic Ester Rearrangement
作者:Yu-Ping He、Hua Wu、Qian Wang、Jieping Zhu
DOI:10.1021/jacs.1c03915
日期:2021.5.19
building block in organic synthesis and a pharmacophore in medicinal chemistry. However, catalytic enantioselective methods for the construction of this N,O-heterocycle remain scarce. We report herein a chiral phosphoric acid-catalyzed enantioselectivesynthesis of C3-substituted morpholinones from aryl/alkylglyoxals and 2-(arylamino)ethan-1-ols. The reaction proceeds through a domino [4 + 2] heteroannulation
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.
Polymorphic form of a tachykinin receptor antagonist
申请人:Merck & Co., Inc.
公开号:US05457107A1
公开(公告)日:1995-10-10
This invention is concerned with a novel polymorphic form of the compound 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(3-(5-oxo-1H,4H-1,2,4-triazolo )methyl)-3-(S)-phenyl-morpholine which is a tachykinin receptor antagonist useful in the treatment of inflammatory diseases, pain or migraine, asthma, and emesis. The instant polymorphic form has advantages over the other known forms of 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(3-(5-oxo-1H,4H-1,2,4-triazolo )methyl)-3-(S)-phenyl-morpholine in terms of thermodynamic stability and suitability for inclusion in pharmaceutical formulations.