Betuligenol derivative with growth inhibition and antifeedant activity
摘要:
The title chiral amine, 3-(4-methoxyphenyl)-1-methylpropylamine 5 has been synthesized from naturally abundant betuligenol 1 in three steps and also in good yield. Furthermore, the versatile intermediate 3 could be manipulated for the preparation of chiral disulphide 7. The amine derivative 5 prepared from (-)-betuligenol showed significant growth inhibition and antifeedant activity. (C) 2004 Elsevier Ltd. All rights reserved.
Enantiomeric enrichment and stereoselective synthesis of chiral amines
申请人:CELGENE CORPORATION
公开号:EP0404146A2
公开(公告)日:1990-12-27
Amines in which the amino group is on a secondary carbon atom which is chirally substituted can be enantiomerically enriched by the action of an omega-amino acid transaminase which has the property of preferentially converting one of the two chiral forms to a ketone. The process also can be used to stereoselectively synthesize one chiral form from ketones substantially to the exclusion of the other.
Ir(I)-Catalyzed Enantioselective Secondary sp<sup>3</sup> C–H Bond Activation of 2-(Alkylamino)pyridines with Alkenes
作者:Shiguang Pan、Kohei Endo、Takanori Shibata
DOI:10.1021/ol201907w
日期:2011.9.2
A cationic Ir(1)-tolBINAP complex catalyzed an enantioselective C-C bond formation initiated by secondary sp(3) C-H bond cleavage adjacent to a nitrogen atom. The reaction of 2-(alkylamino)pyridines with various alkenes gave chiral amines In good yields with high enantiomeric excesses.
Potent, selective benzenesulfonamide agonists of the human β3 adrenergic receptor
作者:Ann E. Weber、Robert J. Mathvink、Leroy Perkins、Jennifer E. Hutchins、Mari R. Candelore、Laurie Tota、Catherine D. Strader、Matthew J. Wyvratt、Michael H. Fisher
DOI:10.1016/s0960-894x(98)00169-3
日期:1998.5
A cloned human beta(3) adrenergic receptor assay was used to identify phenoxypropanolamine agonist 1. SAR studies led to the identification of benzenesulfonamide derivative 20, a 6.3 nM beta(3) agonist which shows 30-fold selectivity for beta(3) agonist activity over beta(1) and beta(2) receptor binding. Further refinement of this lead provided 4-bromo derivative 39, a subnanomolar agonist with 660-fold and 230-fold selectivity over beta(1) and beta(2), respectively. (C) 1998 Elsevier Science Ltd. All rights reserved.