Toward the Development of a General Chiral α-Substituted Acetate Enolate Synthon for Aldolization. DMAP- and NEt3-Promoted Oxazolidinethione “Deacylation”
A General Asymmetric Synthesis of <i>syn</i>- and <i>anti</i>-β-Substituted Cysteine and Serine Derivatives
作者:Chiyi Xiong、Wei Wang、Victor J. Hruby
DOI:10.1021/jo011172x
日期:2002.5.1
syn-beta-substituted cysteine and serinederivatives. In this approach, the key intermediates, > 94% enantiomerically pure cyclic sulfates 3 and aziridines 7, were prepared from alpha,beta-unsaturated esters 1, employing the Sharpless asymmetric dihydroxylation. The high regio- and stereoselective ring-opening reactions of cyclic sulfates and aziridines provided enantiomerically pure beta-substituted cysteine and serine
Disclosed is a total synthesis of a biologically active β-Lactam—Compound 3, which is related to Salinosporamide A and Omuralide, both structurally and by its activity as a proteasome inhibitor.
Also disclosed are proteasome inhibiting compounds having the formula:
wherein:
R
1
is a cyclolower alkyl group; or R
1
is a lower alkyl group; and R
2
is either hydrogen or a lower alkyl group; R
3
is either hydrogen or a lower alkyl group; R
4
a halo-lower alkyl group; and R
5
is either hydrogen or a lower alkyl group.
[EN] PROTEASOME INHIBITING BETA LACTAM COMPOUNDS<br/>[FR] COMPOSES DE BETA LACTAM INHIBANT LE PROTEASOME
申请人:HARVARD COLLEGE
公开号:WO2007033039A2
公开(公告)日:2007-03-22
[EN] Disclosed is a total synthesis of a biologically active ß-Lactam - Compound 3, which is related to Salinosporamide A and Omuralide, both structurally and by its activity as a proteasome inhibitor. Also disclosed are proteasome inhibiting compounds having the formula: wherein: R1 is a cyclolower alkyl group; or R1 is a lower alkyl group; and R2 is either hydrogen or a lower alkyl group; R3 is either hydrogen or a lower alkyl group; R4 a halo - lower alkyl group; and R5 is either hydrogen or a lower alkyl group. [FR] L'invention concerne une synthèse totale d'un composé 3 de ß-Lactam actif sur le plan biologique, relatif aux Salinosporamide A et Omuralide, aussi bien sur le plan structurel que de par son activité comme inhibiteur du protéasome. L'invention concerne également des composés inhibiteur du protéasome de formule (I): dans laquelle R1 désigne un groupe alkyle cyclo-inférieur; ou R1 représente un groupe alkyle inférieur; et R2 représente soit l'hydrogène, soit un groupe alkyle inférieur; R3 représente soit l'hydrogène, soit un groupe alkyle inférieur; R4 représente un groupe halo alkyle inférieur; et R5 désigne soit l'hydrogène, soit un groupe alkyle inférieur.