A high-yielding method was developed for the preparation of ingenol 3-angelate (PEP005, ingenol mebutate) via the corresponding 5,20-acetonide without concomitant isomerization of the angelate (Z-form) to the corresponding tiglate (E-form). The general scope of the stereoconservative esterification method was further evaluated on several different alcohols, giving the angelates in up to quantitative yield without isomerization to the tiglate.
A Continuous Flow Process For The Preparation Of Ingenol-3-Mebutate
申请人:Alphora Research Inc.
公开号:US20170190652A1
公开(公告)日:2017-07-06
Disclosed is a continuous process for the preparation of ingenol-3-mebutate by reaction, in solution, of ingenol or ingenol anion and angelic anhydride or an equivalent angelylating agent. The continuous flow process is preferably performed in the presence of a base such as lithium hexamethyl disilazane (LiHMDS) and/or an activating agent such as dicyclohexylcarbodiimide (DCC). Also disclosed is a process for recycling the other reaction products obtained in the continuous process for preparation of ingenol-3-mebutate for formation of ingenol, which can then be recycled to form ingenol-3-mebutate.
US9404131B2
申请人:——
公开号:US9404131B2
公开(公告)日:2016-08-02
[EN] PROCESS FOR THE PREPARATION OF INGENOL-3-ANGELATE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'INGÉNOL-3-ANGÉLATE
申请人:LEO PHARMA AS
公开号:WO2013110753A1
公开(公告)日:2013-08-01
The invention relates to methods for preparing ingenol-3-angelate from ingenol or ingenol derivatives.