(+)-Trienomycins A, B, C, and F and (+)-Mycotrienins I and II: Relative and Absolute Stereochemistry
作者:Amos B. Smith、John L. Wood、Weichyun Wong、Alexandra E. Gould、Carmelo J. Rizzo、Joseph Barbosa、Kanki Komiyama、Satoshi Ōmura
DOI:10.1021/ja961400i
日期:1996.1.1
The complete relative and absolute stereochemistries have been elucidated for the ansamycin antibiotics (+)-trienomycins A, B, and C and their potent antifungal congeners, the (+)-mycotrienins I and II. A new species, (+)-trienomycin F, has also been isolated and characterized. In addition, an end-game synthetic strategy for the trienomycins and mycotrienins has been developed.
安沙霉素抗生素 (+)-三烯霉素 A、B 和 C 及其有效的抗真菌同源物 (+)-霉菌三烯素 I 和 II 的完整相对和绝对立体化学已经阐明。一个新物种,(+)-trienomycin F,也已被分离和表征。此外,还开发了三烯霉素和霉菌三烯素的最终合成策略。
Synthesis of peptide-functionalized diacylaminoepindolidiones as templates for β-sheet formation
作者:D.S. Kemp、Benjamin R. Bowen
DOI:10.1016/s0040-4039(00)80683-8
日期:1988.1
-2,8-[(N-ureido-Gly-L-Phe-NMe2)-L-Pro-D-Ala-NH)]-epindolidione 1 has been synthesized in nine steps from dimethyl dihydroxyfumarate and p-nitroaniline. Design principles leading to the choice of 1 as a model for studying the folding of β-pleated sheets are discussed.
Isolation and structure determination of (+)-trienomycin F. An endgame synthetic strategy for the trienomycin family of antitumor antibiotics
作者:Amos B. Smith、John L. Wood、Alexandra E. Gould、Satoshi Ōmura、Kanki Komiyama
DOI:10.1016/s0040-4039(00)74289-4
日期:1991.3
A new trienomycin antibiotic, (+)-trienomycin F (4), has been isolated and characterized. The structure was elucidated via spectroscopic comparison with semisynthetic 4 prepared from (+)-trienomycinol (5). The latter sequence implemented an endgame synthetic strategy designed to furnish the trienomycin family of antibiotics from a common advanced intermediate [i.e., macrocycle (+)-5].
Synthesis and conformational analysis of epindolidione-derived peptide models for .beta.-sheet formation
作者:D. S. Kemp、Benjamin R. Bowen、Christopher C. Muendel
DOI:10.1021/jo00302a033
日期:1990.7
Cyclic peptides as selective tachykinin antagonists
作者:Brian J. Williams、Neil R. Curtis、Alexander T. McKnight、Janet J. Maguire、Stephen C. Young、Daniel F. Veber、Raymond Baker
DOI:10.1021/jm00053a001
日期:1993.1
Twenty homodetic cyclic peptides based on the C-terminal sequence of substance P were prepared (Table I) by a combination of solid-phase techniques and cyclizations using azide coupling Incorporation of dipeptide mimics based on substituted gamma-lactams were used in some cases to restrict their conformational mobility. Five of these cyclic peptides were shown to have high tachykinin antagonist activity (pA2 > 6) at NK-2 receptors (rat vas deferens). The two most potent of this series, XVII, cyclo(Gln-Trp-Phe-Gly-Leu-Met) (pA2 = 8.1), and I cyclo(Gln-Trp-Phe-(R)Gly[ANC-2]Leu-Met) (pA2 = 6.7), were selective for NK-2 receptors compared with the other tachykinin receptors (Table II).