A cyclopeptide-based anionreceptor containing alternating 6-aminopicolinic acid and substituted (4R)-4-aminoproline subunits with appended β-alanine residues binds sulfateanions in water. Importantly, appreciable sulfate binding is even observed in phosphate buffer, hence in the presence of anions of similar structure but with a different degree of protonation. The cause for the high selectivity
Synthesis of actinomycin analogs: XXIV. Non-symmetric derivatives of actinocin containing benzo-18-crown-6 moiety and tertiary ammonium group
作者:D. V. Ovchinnikov、A. I. Ponyaev
DOI:10.1134/s1070363216120070
日期:2016.12
Non-symmetric derivatives of actinocin containing fragments of benzo-18-crown-6 and dimethylaminopropylamine (with the crown ether group separated from the heterocyclic chromophore by β-alanine moiety) have been prepared as models of actinomycin D.
(EN) Certain aza cyclohexapeptide compounds have been found to have superior antibiotic properties. Novel processes for their preparation are also described.(FR) On a découvert que certains aza cyclohexapeptides présentent des propriétés antibiotiques supérieures. De nouveaux procédés de préparations de ces derniers sont également décrits.
(中文) 发现某些aza环己六肽化合物具有优越的抗生素特性。同时也描述了它们的新型制备过程。
Synthesis and structure-activity relationships of novel 3′-Hty-substituted pneumocandins
作者:Regina M Black、James M Balkovec、Karl M Nollstadt、Sarah Dreikorn、Kenneth F Bartizal、George K Abruzzo
DOI:10.1016/s0960-894x(97)10107-x
日期:1997.11
A series of pneumocandin B-0 analogs substituted at the 3'-position of the homotyrosine (Hty) residue have been prepared and evaluated for their inhibition of 1,3-beta-(D)-glucan synthesis and for their antifungal activity against C. albicans. Cationic analogs displayed enhanced antifungal properties. The phenolic hydroxyl is involved in a critical hydrogen-bond at the binding site of the enzyme. (C) 1997 Elsevier Science Ltd.