A highly enantioselective approach towards optically active γ-amino alcohols by tin-catalyzed kinetic resolution of 1,3-amino alcohols
作者:Jian Song、Wen-Hua Zheng
DOI:10.1039/d2cc01963a
日期:——
A highlyenantioselective kinetic resolution of racemic 1,3-amino alcohols via O-Acylation was achieved using a chiral organotin as the catalyst. Alkyl- and aryl-substituted 1,3-amino alcohols were resolved with excellent efficiencies to afford the recovered 1,3-amino alcohols and acylative products with high enantioselectivities, with s factors up to >600. Notably, the chiral organotin catalyst was
Lewis acid mediated SN2-type nucleophilic ring opening followed by [4+2] cycloaddition of N-tosylazetidines with aldehydes and ketones: synthesis of chiral 1,3-oxazinanes and 1,3-amino alcohols
作者:Manas K. Ghorai、Kalpataru Das、Amit Kumar
DOI:10.1016/j.tetlet.2007.04.097
日期:2007.6
A highly efficient strategy for Cu(OTf)(2) mediated S(N)2-type nucleophilic ring opening followed by [4+2] cycloaddition reactions of enantiopure 2-phenyl-N-tosylazetidines with various aldehydes and ketones afforded a variety of substituted 1,3-oxazinanes and 1,3-amino alcohols in excellent yields, excellent de and good to excellent ee. The proposed S(N)2-type mechanism of the cycloaddition reaction is supported by experimental evidence. (c) 2007 Elsevier Ltd. All rights reserved.