Synthesis of beta-Lactamase activated nitric oxide donors
摘要:
In order to achieve site specific delivery of NO, we designed conjugates of cephalosporin with NO donors. NO donors such as cupferron and SIN-1 were evaluated as potential choices for conjugates. Cephalosporin conjugated with SIN-1 demonstrated promising beta-lactamase dependent NO releasing ability. (C) 2003 Elsevier Science Ltd. All rights reserved.
[EN] COMPOSITIONS AND METHODS FOR ADOPTIVE CELL THERAPY<br/>[FR] COMPOSITIONS ET PROCÉDÉS POUR LA THÉRAPIE CELLULAIRE ADOPTIVE
申请人:MEMORIAL SLOAN KETTERING CANCER CENTER
公开号:WO2019006467A1
公开(公告)日:2019-01-03
Provided herein are compositions and methods for adoptive cell therapy comprising engineered immune cells that express an antigen-targeted chimeric antigen receptor and a prodrug converting enzyme for the treatment of inflammation, inflammatory diseases, or pathogenic infections.
[EN] COMPOSITIONS AND METHODS FOR ADOPTIVE CELL THERAPY FOR CANCER<br/>[FR] COMPOSITIONS ET MÉTHODES DE THÉRAPIE CELLULAIRE ADOPTIVE CONTRE LE CANCER
申请人:MEMORIAL SLOAN KETTERING CANCER CENTER
公开号:WO2019006465A1
公开(公告)日:2019-01-03
Provided herein are compositions and methods for adoptive cell therapy comprising engineered immune cells that express a tumor antigen-targeted chimeric antigen receptor and a prodrug converting enzyme.
Mild preparation of cephalosporin allyl and p-methoxybenzyl esters using diazoalkanes
作者:Sherman T. Waddell、Gina M. Santorelli
DOI:10.1016/0040-4039(96)00183-9
日期:1996.3
Vinyl or p-methoxyphenyldiazomethane reacts rapidly with cephalosporins in ether/methylene chloride cosolvent to give the C-9 allyl and p-methoxybenzylesters, respectively, in good yields, with no isomerization of the double bond to Δ-2.
Synthesis of acylhydrazido-substituted cephems. Design of cephalosporin-vinca alkaloid prodrugs: substrates for an antibody targeted enzyme
作者:Louis N. Jungheim、Timothy A. Shepherd、Damon L. Meyer
DOI:10.1021/jo00034a027
日期:1992.4
Cephalosporin 20 substituted at the C-3' position with the potent oncolytic agent desacetylvinblastine hydrazide (3) was synthesized as a potential prodrug for the treatment of solid tumors. The design of this novel prodrug was based on the knowledge that hydrolysis of a cephalosporin's beta-lactam bond can result in the expulsion of the C-3' substituent. Proper selection of the linkage used to join the cephem to the vinca, e.g., 8 vs 20, provided a releasable form of the drug as well as a chemically stable prodrug. We envisioned the conversion of prodrug to free vinca to be mediated by an immunoconjugate, consisting of a beta-lactamase enzyme covalently attached to a monoclonal antibody, which has been prelocalized at the tumor. Treatment of candidate prodrugs with the P99 beta-lactamase enzyme isolated from Enterobacter cloacae 265A efficiently catalyzed their conversion to the free drug form. A study of model compounds 11 and 18 indicated that cephem 1-beta-sulfoxide 18 was a better substrate for the enzyme than its sulfide counterpart 11. This finding prompted the synthesis of cephem sulfoxide 20 which was efficiently accomplished via condensation of desacetylvinblastine hydrazide with the cephalothin derived cephem 3'-p-nitrophenyl carbonate 15.
Preparation of ceph-3-em esters unaccompanied by .DELTA.3 .fwdarw. .DELTA.2 isomerization of the cephalosporin