Absolute configuration of main chain of AAL-toxins.
摘要:
AAL-toxins TA(1) 1 and TA(2) 2, host-specific toxins produced by Alternaria alternata, were degraded to 2-methylbutanol, 3-methylnonan-1,9-diol and N-protected 4-aminobutan-1-3-diol, which were further converted to (R)-MTPA esters. These esters were correlated with synthesis samples by comparison of their 500 MHz H-1-NMR spectra. The remaining stereocenters were determined by the comparison of H-1-NMR spectra of 6a and 7 derived from 1 and 2 with those of synthetic model compounds. These data conclude that AAL-toxins possess 2S, 4S, 5R, 11S, 13S, 14R and 15R configurations.
Simple Three-Step Synthesis of (<i>R</i>)- and (<i>S</i>)-4-Amino-3-hydroxybutanoic Acid (GABOB) by Stereoselective Aldol Addition
作者:Manfred Braun、Delia Waldmüller
DOI:10.1055/s-1989-27410
日期:——
A simple synthesis of both (R)- and (S)-GABOB (5) is reported. In the key step, doubly deprotonated (R)- or (S)-2-Hydroxy-1,2,2-triphenylethyl acetate (HYTRA) (1) is added to Cbz-protected glycinal (2).
A convenient one-pot procedure for synthesis of thiol esters using magnesium ion as a catalyst
作者:Shunsaku Ohta、Masao Okamoto
DOI:10.1016/s0040-4039(01)81874-8
日期:1981.1
Various thiol esters (R1 COSR2) were prepared in high yields by treatment of 1-acylimidazole with thiols in the presence of a catalytic amount of Mg(OEt)2. Malonic half-thiol esters [R1OCOCH(R3)COSR2] were also prepared in good yields by treating magnesium monoalkyl malonate [R1 OCOCH(R3)COOMg12] with carbonyl-1,1′-diimidazole followed by addition of thiols.
HETEROARYL-CARBOXYLIC ACID (SULFAMOYL ALKYL) AMIDE - DERIVATIVES AS FACTOR XA INHIBITORS
申请人:WAGNER Michael
公开号:US20080167346A1
公开(公告)日:2008-07-10
The present invention relates to compounds of the formula I,
which exhibit a strong antithrombotic effect and are suitable, for example, for the therapy and prophylaxis of cardiovascular disorders like thromboembolic diseases or restenoses.
Heteroaryl-carboxylic acid (sulfamoyl alkyl) amide-derivatives as factor Xa inhibitors
申请人:Sanofi-Aventis
公开号:US08088925B2
公开(公告)日:2012-01-03
The present invention relates to compounds of the formula I,
which exhibit a strong antithrombotic effect and are suitable, for example, for the therapy and prophylaxis of cardiovascular disorders like thromboembolic diseases or restenoses.
BENZAMIDE DERIVATIVES FOR INHIBITING THE ACTIVITY OF ABL1, ABL2 AND BCR-ABL1
申请人:Furet Pascal
公开号:US20150126485A1
公开(公告)日:2015-05-07
The present invention relates to compounds of formula (I): in which Y, Y, R, R 2, R 3 and R 4 are defined in the Summary of the Invention; capable of inhibiting the tyrosine kinase enzymatic activity of the Abelson protein (ABL1), the Abelson-related protein (ABL2) and related chimeric proteins, in particular BCR-ABL1. The invention further provides a process for the preparation of compounds of the invention, pharmaceutical preparations comprising such compounds and methods of using such compounds in the treatment of cancers.