Process for the preparation of bis-(.beta.-carboxyethyl)alkyl ph

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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2604656, 2604658R, C07F 953

Patent

active

041490142

ABSTRACT:
Lower alkyl bis-(.beta.-carboxyethyl) phosphine oxides are prepared from tris-cyanoethyl phosphine in a functionally coordinated sequentially ordered process comprising alkylating the tris-cyanoethyl phosphine to a phosphonium salt, dequarternizing the phosphonium salt to a lower alkyl bis-(.beta.-cyanoethyl) phosphine, oxidizing the phosphine to phosphine oxide, hydrolyzing the phosphine oxide with calcium hydroxide to produce a calcium salt of lower alkyl bis-(.beta.-carboxyethyl) phosphine oxide, and acidifying the calcium salt to produce lower alkyl bis-(.beta.-carboxyethyl) phosphine oxide.

REFERENCES:
patent: 3784638 (1974-01-01), Lambert

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