Synthesis of N-Acetyl-3-phenylisoserinates of Sesquiterpenoid Alcohols of Lactarius Origin
作者:Rafał Barycki、Maria Gumułka、Marek Masnyk、Włodzimierz M. Daniewski、Mirosław Kobus、Mirosław Łuczak
DOI:10.1135/cccc20020075
日期:——
Important biological properties of Taxol i.e. 13-N-benzoyl-(2R,3S)-3-phenylisoserinate of baccatin III and also N-benzoyl-(2R,3S)-3-phenylisoserinates of several sesquiterpenoid alcohols of Lactarius origin prompted us to synthesize N-acetyl-3-phenylisoserinates of latter alcohols in order to check and compare their biological properties. Suitably protected phenylisoserine 5 when reacted with sesquiterpenoid alcohols in the presence of DCC gave appropriate esters 7. These, after catalytic hydrogenation deprotection produced aminols 8, which were acetylated and gave the required N-acetyl-3-phenylisoserinates 9a-9g.
作者:Daniela Andina、Maria de Bernardi、Alessandra del Vecchio、Giovanni Fronza、Giorgio Mellerio、Giovanni Vidari、Paola Vita-Finzi
DOI:10.1016/0031-9422(80)85020-5
日期:1980.1
Abstract Three new sesquiterpenes, furanether A, furosardonin A and sardonialactone A (7-hydroxyblennin A), together with lactaral, vellerolactone, two known furan alcohols, lactarorufin A and cerevisterol, were isolated fromRussulasardonia . Structures and stereochemistry were elucidated by spectral data and correlation to known compounds by chemical transformations.
摘要 从红菇中分离到了三种新的倍半萜,呋喃醚 A、呋喃沙酮 A 和 sardonialactone A (7-hydroxyblennin A),以及乳醛、velerolactone、两种已知的呋喃醇乳妥鲁芬 A 和 cerevisterol。通过光谱数据和通过化学转化与已知化合物的相关性来阐明结构和立体化学。
Synthesis and antifeedant properties of N-benzoylphenylisoserinates of Lactarius sesquiterpenoid alcohols
作者:Piotr Kopczacki、Maria Gumułka、Marek Masnyk、Halina Grabarczyk、Gerard Nowak、Włodzimierz M Daniewski
DOI:10.1016/s0031-9422(01)00294-1
日期:2001.11
The esterification of various sesquiterpenoid alcohols of Luctarius origin with N-benzoyl-[2R,3S]-phenylisoserine (side chain of Taxol (R)) produced compounds whose antifeedant properties against storage pests Tribolium confusum, Trogoderma granarium and Sitophylus granarius were measured. The introduction of the taxol side chain in these molecules, in comparison to original compounds, moderately enhanced their antifeedant activities, as well as changed their selectivity of activity towards the test insects. (C) 2001 Elsevier Science Ltd. All rights reserved.
Total synthesis of some marasmane and lactarane sesquiterpenes.
作者:Scott K. Thompson、Clayton H. Heathcock
DOI:10.1021/jo00048a036
日期:1992.10
A general and efficient synthetic route to the marasmane sesquiterpenes (+/-)-isovelleral (2) and (+/-)-stearoylvelutinal (1b) is described. Total syntheses of two other naturally occurring sesquiterpenes, deconjugated anhydrolactarorufin A (5) and lactarorufin A (6), were achieved using an acid-catalyzed ring expansion of lactone 25. All four syntheses are highly stereoselective and do not require the use of any protecting groups. Finally, the protic acid-catalyzed degradation of velutinal (1a) was investigated in an effort to chemically induce the biologically important conversion of velutinal (1a) to isovelleral (2). The experimental results thus obtained indicate that an enzymatic mechanism for the key transformation of velutinal (1a) into isovelleral (2) is more plausible than one that is acid-catalyzed.
Biogenesis-like conversion of marasmane to lactarane and seco-lactarane skeleton
作者:Maria De Bernardi、Giovanni Vidari、Paola Vita-Finzi、Katia Gluchoff Fiasson