Edge, Graham J.; Imam, Syed H.; Marples, Brian A., Journal of the Chemical Society. Perkin transactions I, 1984, p. 2319 - 2326
作者:Edge, Graham J.、Imam, Syed H.、Marples, Brian A.
DOI:——
日期:——
Steroidal Dihydro-1,3-oxazines as Antitumor Agents
作者:M. E. Kuehne、E. A. Konopka、B. F. Lambert
DOI:10.1021/jm01237a006
日期:1962.3.1
Biesemans, M.; Woude, G. Van de; Hove, L. van, Bulletin des Societes Chimiques Belges, 1985, vol. 94, # 1, p. 59 - 68
作者:Biesemans, M.、Woude, G. Van de、Hove, L. van
DOI:——
日期:——
Radical–nucleophilic substitution (S<sub>RN</sub>1) reactions. Part 2. Preparation and reactions of α-nitrosulphides
作者:W. Russell Bowman、Devajvoti Rakshit、Michael D. Valmas
DOI:10.1039/p19840002327
日期:——
to the anion of 2-nitropropane, SN2 attack of the anion of 2-nitropropane on symmetrical disulphides, and SRN1reaction of 2-substituted-2-nitropropanes with thiolate anions. The α-nitrosulphides undergo SRN1 substitution with the anion of 2-nitropropane, and SRN1 substitution or redox reactions with thiolate anions. The electron spin resonance (e.s.r.) spectrum of the radical-anion of 1-methyl-1-nitroethyl
Two new pregnane alkaloids, wrightiamines A (1) and B (2), were isolated from the extract of the tropical Apocynaceous plant Wrightia javanica collected in Thailand, and their structures were elucidated by spectral data. Wrightiamine B (2) was preparaed from 3β-hydroxy-5α-pregnan-20-one to establish the configuration of the C-20 position as S. Wrightiamine A (1) exhibited cytotoxic activity against vincristine-resistant murine leukemia P388 cells.
从泰国采集的热带茜草植物 Wrightia javanica 的提取物中分离出了两种新的孕烷生物碱,即 Wrightiamine A (1) 和 B (2),并通过光谱数据阐明了它们的结构。从 3β-hydroxy-5α-pregnan-20-one 中制备出了 Wrightiamine B (2),确定了 C-20 位的构型为 S。Wrightiamine A (1) 对耐长春新碱的小鼠白血病 P388 细胞具有细胞毒活性。