Improving the Affinity and Selectivity of a Nonpeptide Series of Cholecystokinin-B/Gastrin Receptor Antagonists Based on the Dibenzobicyclo[2.2.2]octane Skeleton
作者:S. Barret Kalindjian、Ildiko M. Buck、Julia R. Cushnir、David J. Dunstone、Martin L. Hudson、Caroline M. R. Low、Iain M. McDonald、Michael J. Pether、Katherine I. M. Steel、Matthew J. Tozer
DOI:10.1021/jm00021a019
日期:1995.10
described a novel series of nonpeptidic cholecystokinin-B (CCKB)/gastrin receptor antagonists based on a dibenzobicyclo[2.2.2]octane skeleton. We wish now to report on compounds arising out of our earlier work which have substantially greater affinity as antagonists for the CCKB/gastrin receptor system and which maintain, or improve on, the already high selectivity with respect to CCKA receptors. Thus
Functionalization of Sulfonamide-Containing Peptides through Late-Stage Palladium-Catalyzed C(sp<sup>3</sup>)–H Arylation
作者:Qingqing Bai、Jian Tang、Huan Wang
DOI:10.1021/acs.orglett.9b01953
日期:2019.8.2
Bioactive peptides are emerging as promising candidates of clinic therapeutics. Here, we report a method for late-stage functionalization of sulfonamide-containing peptides through Pd-catalyzed C(sp3)–H arylation. In this protocol, the backbones of N-sulfonated peptides act as directing groups, which allows site-specific arylation of benzylsulfonamide moiety. This chemistry exhibits broad substrate
Quantum Chemical-Based Protocol for the Rational Design of Covalent Inhibitors
作者:Tanja Schirmeister、Jochen Kesselring、Sascha Jung、Thomas H. Schneider、Anastasia Weickert、Johannes Becker、Wook Lee、Denise Bamberger、Peter R. Wich、Ute Distler、Stefan Tenzer、Patrick Johé、Ute A. Hellmich、Bernd Engels
DOI:10.1021/jacs.6b03052
日期:2016.7.13
We propose a structure-based protocol for the development of customized covalent inhibitors. Starting from a known inhibitor, in the first and second steps appropriate substituents of the warhead are selected on the basis of quantum mechanical (QM) computations and hybrid approaches combining QM with molecular mechanics (QM/MM). In the third step the recognition unit is optimized using docking approaches
Stereoselective and N-terminal selective α-alkylation of peptides is achieved using a pyridoxal model compound as an N-terminal activator which also functions as a chiral auxiliary.
使用吡哆醛模型化合物作为 N 端激活剂(也可作为手性助剂)实现肽的立体选择性和 N 端选择性 α-烷基化。
Synthesis of the Dodecapeptide Designated as Bovine γ-Melanotropin (γ-MSH)
The dodecapeptide corresponding to γ-melanotropin, a newly found amino acid sequence in bovine corticotropin-β-lipotropin precursor protein, was synthesized in a conventional manner. The synthetic peptide exhibited weak melanocyte-stimulating activity, but failed to show any significant steroidogenic and lipolytic activities.