Wickerols A 和 B 是二萜类天然产物,具有新型的融合 6-5-6-6 环骨架,对甲型 H1N1 流感病毒具有强大的抗病毒活性。在此,我们分别报告了来自商业谷内酯的 wickerols A 和 B 在 16 步和 15 步中的不同合成。该合成的关键反应是 SmI2 介导的分子内酮-烯丙基乙酸酯还原环化、克莱森重排和分子内烷基化/羟醛反应,以立体控制的方式快速组装紧凑的四环核心框架。此处描述的工作使我们能够确认 wickerols A 和 B 的绝对构型。
Deoxycholic acid degradation by a pseudomonas sp: Phenolic and neutral products
作者:R.A. Leppik
DOI:10.1016/s0040-4020(01)98940-9
日期:1981.1
The microbial degradation of deoxycholicacid by Pseudomonassp. MR108 was studied, and four products were isolated. Evidence is presented that one is the phenol 3,12β - dihydroxy - 9,10 - secoandrosta -1,3,5(10) - trien - 9,17 - dione (11) and that the other three are the neutral compounds 3aαH - 4α - [3' - propionic acid] - 5α - hydroxy - 7aβ - methyl - hexahydro -1 - indanone - δ - lactone (12)
Microbial degradation of steroids to hexahydroindanone derivatives.
作者:Tsuyoshi NAKAMATSU、Teruhiko BEPPU、Kei ARIMA
DOI:10.1271/bbb1961.44.1469
日期:——
A Mutated strain of Nocardia corallina IFO 3338 accumulated following substances as cholesterol degradation products, 3aα-H-4α-[3'-propionic acid]-5α-hydroxy-7aβ-methylhexa-hydro-l-indanone-δ-lactone (VIII), 3aα-H-4α-[3'-trans acrylic acid]-5α-hydroxy-7aβ-methyl-hexahydro-l-indanone (IX) and 3aα-H-4α-acetyl-5α-hydroxy-7aβ-methylhexahydro-1-inda-none (X). Substance X is a new compound in the microbial degradation of sterols. These substances were also produced from steroid other than cholesterol, such as β-chole-stanol, β-sitosterol, soy bean sterol (mixture), cholest-4-en-3-one, lithocholic acid, cholic acid and progesterone. A degradation pathway has been proposed for steroids by Nocardia corallina: cholesterol or other sterols_??_3aα-H-4α-[3'-propionic acid]-7aβ-methylhexahydro-l, 5-indanedione or compound VIII_??_3aα-H-4α-[3'-trans acrylic acid]-7aβ-methylhexahydro-l, 5-indanedione or compound IX_??_3aα-H-4α-acetyl-7aβ-methylhexahydro-1, 5-indanedione or compound X_??_C02+H2O.
PROCESS FOR THE PREPARATION OF 17BETA-HYDROXY-DES-A-ANDROST-9,10-EN-5-ONE
申请人:INDUSTRIALE CHIMICA S.R.L.
公开号:US20180339956A1
公开(公告)日:2018-11-29
The present invention relates to a new process for the synthesis of 17β-hydroxy-des-A-androst-9,10-en-5-one, the compound of the following formula (1), which can be used as an intermediate in the synthesis of retroprogesterones.
important intermediates for the synthesis of a variety of steroidal medicines with an α-methyl group or without the methyl group at the C10-position. Although they can be prepared by chemical synthesis or microbial transformation of steroids, their low efficiency and the formation of by-products limit their application. In this study, by investigating the degradation pathway of steroidalC/D rings and
3aα - H -4α-(3'-丙酸)-5α-羟基-7aβ-甲基六氢-1-茚满酮-δ-内酯(苯乙内酯或HIL)和3aα - H -4α-(3'-丙酸)- 7aβ-甲基六氢-1,5-茚满二酮(HIP)是重要的中间体,用于合成各种甾族药物,其中C10位具有α-甲基或无甲基。尽管它们可以通过类固醇的化学合成或微生物转化来制备,但它们的低效率和副产物的形成限制了它们的应用。在这项研究中,通过研究类固醇C / D环的降解途径并分析转基因分枝杆菌ΔfadD3和ΔfadE30引起的植物甾醇分解代谢中的代谢物(ATCC 6841),鉴定出两个羧酸还原酶基因(car1和car2)与HIP的降解有关。菌株ΔfadD3或ΔfadE30中这两个car基因的失活分别阻止了其他代谢物的产生并增强了HIP或HIL的积累。在制备规模上,重组菌株将植物甾醇以20 g L -1转化为HIP或HIL底物浓度分别达到88%或75
[EN] PROCESS FOR THE PREPARATION OF 17BETA-HYDROXY-DES-A-ANDROST-9,10-EN-5-ONE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 17 BÊTA-HYDROXY-DES-A-ANDROST-9,10-EN-5-ONE
申请人:IND CHIMICA SRL
公开号:WO2017072719A1
公开(公告)日:2017-05-04
The present invention relates to a new process for the synthesis of 17β-hydroxy- des-A-androst-9,10-en-5-one, the compound of the following formula (1), which can be used as an intermediate in the synthesis of retroprogesterones.