Stereocontrolled convergent synthesis of hydroxyethylene dipeptide isosteres by the reaction of α-amino aldehyde with alkoxytitanium homoenolates
作者:Shinzo Kano、Tsutomu Yokomatsu、Shiroshi Shibuya
DOI:10.1016/0040-4039(91)80863-2
日期:1991.1
The reaction of (S)-α-dibenzylamino aldehydes with dichloroisopropoxytitanium esterhomoenolates gave the corresponding γ-aminoalkyl γ-lactones with high erythro selectivity. The same reaction by the use of amide homoenolates also afforded the corresponding 2-amino alcohols with high erythro-selectivity.
Diastereoselective synthesis of hydroxyethylene dipeptide isosteres
申请人:Emory University
公开号:US05587514A1
公开(公告)日:1996-12-24
A process for the synthesis of hydroxyethylene dipeptide isosteres from .alpha.-N,N-di(protected)-amino(alkyl or substituted alkyl)methyl ketones that can be efficiently carried out on an industrial scale. The process proceeds with excellent diastereoselectivity and chemical efficiency, and can be used to prepare a wide variety of hydroxyethylene dipeptide isosteres for a variety of uses, including as HIV-1 protease inhibitors and renin inhibitors.
A process for the synthesis of hydroxyethylene dipeptide isosteres from .alpha.-N,N-di(protected)amino(alkyl or substituted alkyl) methyl ketones that can be efficiently carried out on an industrial scale. The process proceeds with excellent diastereoselectivity and chemical efficiency, and can be used to prepare a wide variety of hydroxyethylene dipeptide isosteres for a variety of uses, including as HIV-1 protease inhibitors and renin inhibitors.
One-Step Highly Diastereoselective Synthesis of γ-Aminoalkyl-Substituted γ-Butyrolactones by an Asymmetric Samarium-Mediated Ketyl−Alkene Coupling Reaction
The samarium(II) iodide mediated reaction of N,N-dibenzyl-protected (S)-alpha-amino aldehydes with (1S,2R)-N-methylephedrinyl acrylate gave the (4R,1'S)-gamma-(aminoalkyl)-gamma-butyrolactones in good yields with high diastereoselectivities (up to 80% de); (4R,1'S)-gamma-amino-(2-phenylethyl)-gamma-butyrolactone (6a), which should be a potent precursor for gamma-secretase inhibitors, was obtained with high de value.