as a potential therapeutic and diagnostic biomarker for PCa. Based on the reported Leu-Arg dipeptide-based hepsin inhibitors, we performed structural modification and determined in vitro hepsin- and matriptase-inhibitory activities. Comprehensive structure-activityrelationshipstudies identified that the p-guanidinophenylalanine-based dipeptide analog 22a exhibited a strong hepsin-inhibitory activity
Sodium borohydride-rhodium chloride in hydroxylicsolvent was proved to be very useful for the reduction of aromatic nuclei to the corresponding saturated cycles under mild conditions.
硼氢化钠-氯化铑在羟基溶剂中被证明对于在温和条件下将芳族核还原为相应的饱和循环非常有用。
Pyrrolidine derivatives
申请人:Zaidan Hojin Biseibutsu Kagaku Kenkyukai
公开号:US05756763A1
公开(公告)日:1998-05-26
The invention relates to novel pyrrolidine derivatives represented by formula (1): ##STR1## wherein: R1 represents (1) a lower alkyl group having 1 to 6 carbon atoms, or (2) a 3- to 15-membered mono- or fused cyclic hydrocarbon group which may contain a hetero atom on the ring, or which may be substituted with a substituent(s); each of n and m represents an integer and the sum of n and m is an integer of 0 to 2; each of X and E represents oxygen, NR' (wherein R' is hydrogen or a lower alkyl group having 1 to 6 carbon atoms), sulfur, phenylene, CH.dbd.CH or CH.sub.2 ; A represents an amino acid residue or an imino acid residue, which functional group may be optionally protected, or a glycine residue which may be substituted at the amino moiety thereof; and, Y1 represents a cycloalkyl group having 3 to 8 carbon atoms; or a salt thereof. The pyrrolidine derivatives inhibit a prolyl endopeptidase and are expected to be effective for the treatment of amnesia.
Macrocyclization of Maleimide-Decorated Peptides via Late-Stage Rh(III)-Catalyzed Trp(C7) Alkenylation
作者:Yu Zhang、Shulei Hu、Yazhou Li、Yongkun Wang、Tao Yu、Qiangqiang Chen、Jiang Wang、Hong Liu
DOI:10.1021/acs.orglett.3c00601
日期:——
strategy for constructing maleimide-containing peptides and cyclicpeptides using Rh(III)-catalyzed tryptophan (Trp) (C7) alkenylation, which is challenging due to the inherent reactivity of the indole benzenoid ring. This method is scalable and exhibits broad substrate scope. The utility of this protocol could further be demonstrated by the synthesis of peptide conjugates with natural products and amino
A novel pyrrolidine derivative represented by general formula (1) or a pharmaceutically acceptable salt thereof, having a prolyl endopeptidase inhibitor activity and promising as an active ingredient of an antiamnetic. In said formula R1 represents (1) lower alkyl (C₁-C₆) or (2) an optionally substituted hydrocarbon ring group (a 3- to 15-membered monocyclic or fused-ring group); n and m represent each an integer and the sum of them represents an integer of 0 to 2; X and E represent each oxygen. NR' (wherein R' represents hydrogen or C₁-C₆ alkyl), sulfur, phenylene, CH=CH or CH₂; A represents an amino acid or imino acid residue wherein the functional group(s) may be substituted, or a glycine residue wherein the amino group may be substituted; and Y1 represents C₃-C₈ cycloalkyl.