An efficient synthesis of enantiomerically pure 2-[(2R)-arylmorpholin-2-yl]ethanols, key intermediates of tachykinin receptor antagonist
摘要:
We report herein an efficient and practical synthetic method for the preparation of enantiomerically pure 2[(2R)-arylmorpholin-2-yl]ethanols 1a-d, key intermediates of tachykinin receptor antagonist. Sharpless catalytic asymmetric dihydroxylation of 4a-d was employed to introduce the required absolute stereochemistry, and cyclization of 7a-d was accomplished by the Mitsunobu reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.
An efficient synthesis of enantiomerically pure 2-[(2R)-arylmorpholin-2-yl]ethanols, key intermediates of tachykinin receptor antagonist
摘要:
We report herein an efficient and practical synthetic method for the preparation of enantiomerically pure 2[(2R)-arylmorpholin-2-yl]ethanols 1a-d, key intermediates of tachykinin receptor antagonist. Sharpless catalytic asymmetric dihydroxylation of 4a-d was employed to introduce the required absolute stereochemistry, and cyclization of 7a-d was accomplished by the Mitsunobu reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.