[EN] BUILDING BLOCKS FOR STAPLED PEPTIDES<br/>[FR] BLOCS DE CONSTRUCTION POUR PEPTIDES AGRAFÉS
申请人:AGENCY SCIENCE TECH & RES
公开号:WO2018174826A1
公开(公告)日:2018-09-27
This invention relates to a method for producing an alkenyl 1 -aminocyclopropane-1 -carboxylic acid of Formula I wherein R1 is a protecting group, n is an integer between 1 and 10, and A and B are chiral centres such that when A is S, B is R and when A is R, B is S. The method comprises a stereoselective formation of the cyclopropane moiety by cycloaddition onto a double bond, in a molecule comprising a chiral template, Formula lc. Further provided is the use of Formula I in the production of stapled peptides.
Benzaldehyde lyase-catalyzed diastereoselective C–C bond formation by simultaneous carboligation and kinetic resolution
作者:Christoph R. Müller、María Pérez-Sánchez、Pablo Domínguez de María
DOI:10.1039/c2ob27344f
日期:——
possibilities of biocatalysis. Benzaldehyde lyase (BAL) affords highly diastereoselective α-hydroxy-ketones by simultaneously performing ligation and kinetic resolution of a racemic aldehyde. Thus, to the well-known enantioselective BAL-carboligation of aldehydes (C–C bond formation), another property, namely diastereoselectivity, is added in this paper for the first time.
α-Imino ketone is a useful building block for the preparation of α-amino ketones and α-amino alcohols. However, its preparation has been seldomly seen. Herein, a metal-free and operationally simple strategy has been developed to generate α-imino ketones with high regioselectivity. Meanwhile, the method allowed for the preparation of various N,O-ketals with high regioselectivities and diastereoselectivities
A New Type of P–C and C–C Bond Cleavage Reactions in α-Trimethylsilyloxy-β-oxo Phosphonates and α-Ethoxy-β-oxo Phosphonates. The Synthesis of Unsymmetrical α-Hydroxy Ketones Utilizing 1:1 Carbonyl Adducts of Diethyl Trimethylsilyl Phosphite with Benzaldehyde
作者:Mitsuo Sekine、Masashi Nakajima、Tsujiaki Hata
DOI:10.1246/bcsj.55.218
日期:1982.1
α-Lithiated diethyl α-(trimethylsilyloxy)benzylphosphonate underwent facile acylation with various acylating agents to afford the corresponding α-acylated products in good yields. On treatment of the α-acylated products with 1 M NaOH–EtOH (1:1, v/v) the P–C bond was cleaved with elimination of diethyl phosphate to give α-hydroxy ketones predominantly. On the other hand, when diethyl α-acyl-α-ethoxybenzylphosphonates
[EN] SMALL MOLECULE NEUTRAL SPHINGOMYELINASE 2 (NSMASE2) INHIBITORS<br/>[FR] INHIBITEURS DE LA SPHINGOMYÉLINASE NEUTRE DE TYPE 2 À PETITES MOLÉCULES (NSMASE2)
申请人:UNIV JOHNS HOPKINS
公开号:WO2020160148A1
公开(公告)日:2020-08-06
Small molecule inhibitors of neutral sphingomyelinase 2 (nSMase2) and their use for treating neurodegenerative diseases, such as, neurodegenerative diseases associated with high levels of ceramide, including, but not limited to Alzheimer's disease (AD), HIV-associated neurocognitive disorder (HAND), multiple sclerosis (MS), and amyotrophic lateral sclerosis (ALS), and, in other aspects, for treating cancer or HIV-1, are provided.