Diastereoselective Reactions of a Homoenolate Generated from (S)-N-(1-Phenylethyl)-3-(trimethylsilyl)propanamide: Enantioselective Synthesis of (+)-Massoialactone
The thiolate- or selenolate-induced Michaelâaldol tandem process using secondary α,β-unsaturated amides gave α-phenylthio- or α-phenylseleno-methyl-β-hydroxy amides syn-selectively, which were readily converted into NH-amide aldols or BaylisâHillman adducts.
Silver Acetate Catalysed Asymmetric1,3-Dipolar Cycloadditions of Imines and Chiral Acrylamides
作者:Miklós Nyerges、David Bendell、Andrea Arany、David E. Hibbs、Simon J. Coles、Michael B. Hursthouse、Paul W. Groundwater、Otto Meth-Cohn
DOI:10.1055/s-2003-39325
日期:——
N-Metallated azomethine ylides 5 were generated by the reaction of arylidene glycine imines 1 with AgOAc and triethylamine. These azomethine ylides undergo cycloaddition to chiral acrylamides 2 with excellent diastereoselectivity. The configuration of two of the cycloadducts (3a 1 and 3c 1 ) has been confirmed by X-ray crystallography.
Simple organometallic chiral derivatising agents for the<sup>31</sup>P n.m.r. assay of the enantiomeric purity of certain η<sup>2</sup>-donors
作者:David Parker、Richard J. Taylor
DOI:10.1039/c39870001781
日期:——
The chiral palladium and platinum ethene complexes (1) act as chiral derivatising agents for the 31P n.m.r. assay of the enantiomeric purity of certain chiral alkenes and allenes.
The alkaloids (+)- and (−)-indolizidine 167B were synthesized via radicaladdition of a carbon radical to a chiral acrylamide. Further cyclization in the presence of BBr3, treatment with ‘nickel boride’ and stereospecifichydrogenation over palladium/carbon in acetic acid were other key steps in this synthesis.
Orally Bioavailable Caffeic Acid Related Anticancer Drugs
申请人:Priebe Waldemar
公开号:US20070232668A1
公开(公告)日:2007-10-04
The present invention concerns compounds and their use to treat cell proliferative diseases such as cancer. Compounds of the present invention display significant potency as inhibitors of Jak2/STAT3 pathways and downstream targets and inhibit the growth and survival of cancerous cell lines.