[EN] PROCESS FOR PREPARING POSACONAZOLE AND INTERMEDIATES THEREOF [FR] PROCÉDÉ DE PRÉPARATION D'UN COMPOSÉ DE POSACONAZOLE ET DE PRODUITS INTERMÉDIAIRES ASSOCIÉS
[EN] A PROCESS FOR THE MANUFACTURE OF POSACONAZOLE<br/>[FR] PROCÉDÉ DE FABRICATION DE POSACONAZOLE
申请人:METROCHEM API PVT LTD
公开号:WO2019077627A1
公开(公告)日:2019-04-25
The present invention discloses an improved process for the manufacture of Posaconazole, an anti-fungal agent belonging to the category of substituted Tetrahydrofuran Triazole compound. The present invention further describes preparation of formula A and formula B, the key intermediates in the preparation of Posaconazole. The invention also discloses novel intermediates that are useful in the synthesis of Posaconazole.
Non-chelation-controlled nucleophilic addition to chiral α-siloxyketones
作者:Manfred T. Reetz、Michael Hüllmann
DOI:10.1039/c39860001600
日期:——
Non-chelation-controlled Grignard-like and aldol additions to O-silyl protected α-hydroxyketones are possible for the first time using titanium reagents of reduced Lewis-acidity.
A new method of preparation of opticallyactive α-hydroxy ketone derivatives has been developed. Incubation of (Z)-3-propionyloxy-4-benzyloxy-2-pentene (1a) with lipase OF gave optically pure (R)-enol propionate 1a, which in turn was convened without racemization to (R)-ketone 2a by the aid of LiAlH4.
new method for the preparation of optically active acyclic α-hydroxy ketone derivatives by thermodynamic resolution using a chiral host compound is described. We examined the resolution of racemic 2-benzyloxy-3-pentanone with chiral host compounds in various solvents. After optimization of the reaction conditions, it has become apparent that the opticalresolution could occur only under certain strict
描述了一种使用手性主体化合物通过热力学拆分制备光学活性无环 α-羟基酮衍生物的新方法。我们研究了外消旋 2-benzyloxy-3-pentanone 与手性主体化合物在各种溶剂中的拆分。在优化反应条件后,很明显,光学拆分只能在溶剂、主体化合物和底物浓度的某些严格条件下发生。在室温下在 MeOH-H 2 O (1:1) 中搅拌带有环己基环的 (-)-TADDOL 的酮悬浮液,该悬浮液源自 L-酒石酸乙酯,产生具有高对映选择性的包合物,得到 (S) - 含高达 99% ee 的酮。另一方面,从滤液中得到的(R)-酮的ee可以通过使用(+)-TADDOL的相同程序得到改善;最后,得到几乎光学纯形式的酮的两种对映异构体。通过 ESI-TOFMS 分析形成的复合体假设主客比为 1:1。这种拆分过程也适用于其他基材,以提供相应的光学活性酮。
[EN] PROCESS FOR THE PREPARATION OF TRIAZOLONES<br/>[FR] PROCEDE POUR LA PREPARATION DE TRIAZOLONES
申请人:SCHERING CORPORATION
公开号:WO1996033178A1
公开(公告)日:1996-10-24
(EN) A process for preparing triazolone compounds of formula (i) comprises heating a mixture of a compound of formula (ii) and a hydrazine derivative of the formula R5-NH-NH-CHO, R5-NH-NH-C(O)OC(CH3)3 or R5-NH-NH-C(O)OCH2C6H5, optionally in the presence of an added base.(FR) Procédé pour préparer des composés à base de triazolone, de formule (i), consistant à chauffer un mélange d'un composé de formule (ii) et d'un dérivé de l'hydrazine de formule R5-NH-NH-CHO, R5-NH-NH-C(O)OC(CH3)3 ou R5-NH-NH-C(O)OCH2C6H5, éventuellement en présence d'une base rajoutée.