The diastereoselectivities of chiral acyl nitroso dienophiles derived from optically pure N-protected alpha-amino hydroxamic acids have been determined in intermolecular hetero Diels-Alder reactions. The cycloaddition reactions afforded synthetically useful quantities of functionally rich, optically pure cycloadducts, useful for the preparation of a variety of compounds of potential biological interest. Molybdenum hexacarbonyl reduction of the cycloadducts gave optically pure allylic alcohols. Osmium tetraoxide-catalyzed dihydroxylation of several bis-allylically substituted intermediates gave only the diastereomerically pure diols corresponding to naturally occurring 2',3'-dihydroxynucleoside analogs.
[EN] HETEROCYCLIC COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES ET LEURS UTILISATIONS
申请人:INFINITY PHARMACEUTICALS INC
公开号:WO2015051241A1
公开(公告)日:2015-04-09
Compounds and pharmaceutical compositions that modulate kinase activity, including PI3 kinase activity, and compounds, pharmaceutical compositions, and methods of treatment of diseases and conditions associated with kinase activity, including PI3 kinase activity, are described herein.
[reaction: see text] A one-step conversion of carboxylic acids to hydroxamicacids under very mild conditions is described. This simple and efficient method has been applied for the synthesis of enantiopure hydroxamate of alpha-amino acids and peptides.
The synthesis of Nα-protected amino hydroxamic acids from Nα-protected amino acids employing versatile chlorinating agent CPI-Cl
作者:U. Vathsala、C. Srinivasulu、L. Santhosh、Vommina V. Sureshbabu
DOI:10.24820/ark.5550190.p010.727
日期:——
Racemization free synthesis of N-protected aminohydroxamicacids from N-protected aminoacids employing the versatile chlorinating reagent CPI-Cl has been described in one-pot. The present protocol has shown compability towards urethane protecting groups like Boc, Cbz and Fmoc, and side chain protections of aminoacids showed complete tolerance.
Disclosed are amino acid mimetics that possess antibiotic properties in prokaryotic cells. These mimetics are coupled to one or more optionally substituted amino acids provided that at least one of the amino acids is an optionally substituted amino acid selected from the group consisting of phenylglycine, tryptophan, phenylalanine, histidine, and tyrosine.
Disclosed are amino acid mimetics that possess chemotherapeutic properties against cancer cells. These mimetics are coupled to one or more optionally substituted amino acids provided that at least one of the amino acids is an optionally substituted amino acid selected from the group consisting of phenylglycine, tryptophan, phenylalanine, histidine, and tyrosine.