DOTA-tris(OPp ester) as a bifunctional prochelator for the preparation of DOTA–peptide conjugates
摘要:
Peptides containing the chelator DOTA have gained importance for molecular imaging and therapy with radionuclides. However, all synthons described for the convergent solid phase synthesis of DOTA-peptide conjugates show windows of stability that are too narrow to allow a clean and convergent deprotection process. The synthesis of the new prochelator DOTA-tris(OPp ester) starting from cyclen is reported. Using this prochelator for the synthesis of several DOTA peptide conjugates revealed that its cleavage-in contrast to the cleavage of DOTA-tris(tBu ester) conjugates-does not require an extended deprotection time, and therefore results in clean and homogenous products. (C) 2012 Published by Elsevier Ltd.
[EN] MACROCYCLIZATION OF PEPTIDOMIMETICS<br/>[FR] MACROCYCLISATION DE PEPTIDOMIMÉTIQUES
申请人:UNIV WARWICK
公开号:WO2019186174A1
公开(公告)日:2019-10-03
The invention provides an improved method of macrocyclization of peptidomimetics, as measured by isolated yields and product distribution, which comprises substitution of one or more of the backbone amide C=O bonds with a turn-inducing motif. The method is general with enhancements seen across a range of ring sizes (e.g. tri-, tetra-, penta- and hexapeptides). Specifically, the invention provides a peptidomimetic macrocycle comprising a carbonyl bioisosteric turn-inducing element having the structure: (I) wherein X is a heteroatom; and wherein R1 to R6 are each independently selected from alkyl, aryl, heteroaryl and H.
[EN] OXABOROLE ESTERS AND USES THEREOF<br/>[FR] ESTERS D'OXABOROLE ET LEURS UTILISATIONS
申请人:ANACOR PHARMACEUTICALS INC
公开号:WO2017195069A1
公开(公告)日:2017-11-16
The present invention provides oxaborole ester compounds and compositions thereof which are useful to treat diseases associated with parasites, such as Chagas Disease and African Animal Trypanosomosis.
[EN] PIPERIDINE DERIVATIVES AS MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY<br/>[FR] DÉRIVÉS DE PIPÉRIDINE EN TANT QUE MODULATEURS D'ACTIVITÉ DE RÉCEPTEUR DE CHIMIOKINE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2009015166A1
公开(公告)日:2009-01-29
The present application describes modulators of MIP-1 of formula (I) : or stereoisomers or pharmaceutically acceptable salts thereof, wherein m, Q, T, W, Z, R1, R3, R4, R5, R5a and R5b, are as set forth above. In addition, methods of treating and preventing inflammatory diseases such as asthma and allergic diseases, as well as autoimmune pathologies such as rheumatoid arthritis and atherosclerosis using the modulators are disclosed.
The chemical synthesis of a bicycle inspired by the natural lasso peptide sungsanpin using a combination of solid‐phase and in‐solution chemistries is described. The bicyclic‐derived topoisomer was designed by introducing a covalent linkage between the ring and the loop, which allowed the tying of these two parts of the peptide, rendering the bicyclic structure. Several structural techniques, such
simple alcohols, alkanes, ethers, and amides. Use of tertiary alkyl ester, α-cumyl ester, is the key for avoiding the known photo-degradation process. Intermolecular C–H bond activation and subsequent C–C bond formation were promoted by irradiation with an LED lamp (365 nm) without any additives. Among the coupling partners, reactions with sterically less demandingamides proceeded efficiently to provide
我们开发了 α-酮酯与几种简单的醇、烷烃、醚和酰胺的光化学偶联反应。使用叔烷基酯、α-枯基酯是避免已知光降解过程的关键。用不含任何添加剂的 LED 灯(365 nm)照射促进分子间 C-H 键活化和随后的 C-C 键形成。在偶联伙伴中,与空间上要求较低的酰胺反应有效地进行,以提供独特的 N-酰基-β-氨基-α-羟基酸衍生物。在苯或丙酮作为溶剂中,与固体氨基酸衍生物的反应提供了四氢-1,4-二氮杂-2,5-二酮衍生物的前体。