Diastereoselective Synthesis of Branched-Chain Cyanonitrosugar Derivatives by Michael Addition/MMPP Oxidation Using Formaldehyde SAMP- and RAMP-Hydrazones as New Chiral Cyanide Equivalents
Stereoselective Nucleophilic Formylation and Cyanation of α-Alkoxy- and α-Aminoaldehydes
作者:Rosario Fernández、Eloísa Martín-Zamora、Carmen Pareja、José M. Lassaletta
DOI:10.1021/jo015711+
日期:2001.7.1
formaldehyde N,N-dialkylhydrazones to carbohydrate-derived alpha-alkoxyaldehydes takes place under neutral conditions and in the absence of catalysts or promoters to afford the corresponding alpha-hydroxyhydrazones in good to excellent yields and with highly anti diastereoselectivities. Subsequent transformations of the hydrazono group into aldehydes and nitriles following known procedures provide a new entry
Formaldehyde dialkylhydrazones smoothly add to sugaraldehydes without any need of promoter or catalyst. α-Hydroxy dialkylhydrazones, which are obtained in good yields and high stereoselectivities, have been successfully transformed in cyanohydrins by treatment with magnesium monoperoxyphtalate (MMPP) and in O-protected α-hydroxy aldehydes by ozonolysis or HCl mediated hydrolysis. No racemization was
ARGININE METHYLTRANSFERASE INHIBITORS AND USES THEREOF
申请人:Epizyme, Inc.
公开号:US20170291905A1
公开(公告)日:2017-10-12
Described herein are compounds of Formula (S-I), pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof. Compounds described herein are useful for inhibiting arginine methyltransferase activity. Methods of using the compounds for treating arginine methyltransferase-mediated disorders are also described.
[EN] ARGININE METHYLTRANSFERASE INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS D'ARGININE MÉTHYLTRANSFÉRASE ET LEURS UTILISATIONS
申请人:EPIZYME INC
公开号:WO2016044626A1
公开(公告)日:2016-03-24
Described herein are compounds of Formula (S-I), pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof. Compounds described herein are useful for inhibiting arginine methyltransferase activity. Methods of using the compounds for treating arginine methyltransferase-mediated disorders are also described.
Diastereoselective Synthesis of Branched-Chain Cyanonitrosugar Derivatives by Michael Addition/MMPP Oxidation Using Formaldehyde SAMP- and RAMP-Hydrazones as New Chiral Cyanide Equivalents
The diastereoselective synthesis of sugar derived β-nitro nitriles through double asymmetric induction experiments involving Michael addition of formaldehyde SAMP- and RAMP-hydrazones [(S)-1 and (R)-1] to sugar nitroolefins 2 in excellent overall yields and high diastereoselective excesses is described. The absolute configuration of the RAMP-hydrazone 1,4-adduct 3c was determined by chemical correlation of its corresponding β-nitro nitrile 4c.