A process for the preparation of Isosulphan Blue is disclosed. The process comprises the following steps: Sulphonating orthochlorobenzaldehyde, treatment with sodium sulphite, basification, condensation and oxidation to obtain Isosulphan Blue.
[EN] METHOD FOR THE PREPARATION OF DIARLYMETHANE DYES AND TRIARYLMETHANE DYES INCLUDING ISOSULFAN BLUE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COLORANTS À BASE DE DIARYLMÉTHANE ET DE COLORANTS À BASE DE TRIARYLMÉTHANE COMPRENANT DU BLEU ISOSULFAN
申请人:NJ BIOPHARMACEUTICALS LLC
公开号:WO2021011440A1
公开(公告)日:2021-01-21
Disclosed herein is a method for the preparation of diarylmethane dyes and triarylmethane dyes, such as Isosulfan Blue, using electrochemistry. Further disclosed is Isosulfan Blue prepared from a process employing electrochemistry, compositions comprising the same, and use of the prepared Isosulfan Blue as an imaging agent.
[EN] ISOSULFAN BLUE, ITS CRYSTALLINE FORM AND PROCESS FOR PREPARATION THEREOF<br/>[FR] BLEU D'ISOSULFANE, SA FORME CRISTALLINE ET SON PROCÉDÉ DE PRÉPARATION
申请人:BIOPHORE INDIA PHARMACEUTICALS PVT LTD
公开号:WO2018008040A1
公开(公告)日:2018-01-11
The invention relates to an improved process for the preparation N-[4-[[4-(diethyl amino) phenyl] (2,5-disulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N- ethylethanaminium inner salt sodium salt (Isosulfan blue) of formula I. The invention also relates to highly pure novel crystalline form of Isosulfan blue (I) hydrate and its process for the preparation thereof. The invention also relates to an improved process for the preparation of Isosulfan blue sodium hydrate having not more than 0.2% of desethyl impurity of formula A.