CuBr2 catalyzed bromination/oxidation of isochromans to benzaldehyde derivatives
摘要:
A series of isochromans were oxidized and brominated by using 1.2 equiv of CuBr2 in CH3CN at reflux to give the corresponding bromo benzaldehydes in moderate yields. A plausible mechanism for this transformation has been suggested. (C) 2013 Elsevier Ltd. All rights reserved.
A mild and efficient method for the methoxymethylation and acetylation of alcohols promoted by benzyltriphenylphosphonium tribromide
作者:Farhad Shirini、Gholam Hossein Imanzadeh、Seyyed Ali Reza Mousazadeh、Iraj Mohammadpoor-Baltork、Masoumeh Abedin
DOI:10.1016/j.cclet.2010.04.031
日期:2010.10
Abstract A mild and efficient method for the conversion of alcohols to their corresponding methoxymethyl ethers and acetates using benzyltriphenylphosphonium tribromide (BTPTB) as catalyst is described. All reactions were performed under completely heterogeneous reaction conditions in good to high yields.
Isochromanone is the core structure of many bioactive compounds. Direct oxidation of isochromans is one of leading methods for the construction of isochromanones, while most established processes remain suffering from the use of environmentally unfriendly metal oxidants, harsh reaction conditions, and the difficulty in catalyst recycling and product separation. Herein, we report a convenient, cost-effective
Molybdatophosphoric acid as a catalyst for the methoxymethylation of alcohols under solvent-free conditions
作者:Mohammad Ali Zolfigol、Morteza Shiri
DOI:10.1070/mc2005v015n04abeh002064
日期:2005.1
The methoxymethylation of alcohols was performed using formaldehyde dimethoxy acetal in the presence of H3PMo12O40 center dot xH(2)O at room temperature under solvent-free conditions.