Patent ID: 9085734
Filing Date: 2015-07-21
Classification: C07F,C08K,C09K

Abstract:
1. A process for preparing monocarboxy-functionalized dialkylphosphinic acids, esters or salts thereof comprising the steps of: a) reacting a phosphinic acid source (I) with olefins (IV) in the presence of a catalyst A to form an alkylphosphonous acid, salt or ester (II) b) reacting the alkylphosphonous acid, salt or ester (II) with at least one alkylene oxide (V) in the presence of a catalyst B and a base to form a monofunctionalized dialkylphosphinic acid derivative (VI) and c) reacting the monofunctionalized dialkylphosphinic acid derivative (VI) with an oxidizing agent, with an oxidizing agent and water or in the presence of a catalyst C with oxygen and water to form a monocarboxy-functionalized dialkylphosphinic acid derivative (III) wherein R