Process for the preparation of bis-({62 -carboxyethyl) alkyl phosphine oxides from bis-({62 -cyanoethyl) alkyl phosphine

摘要

Lower alkyl bis-( beta -carboxyethyl) phosphine oxides are prepared from lower alkyl bis-( beta -cyanoethyl) alkyl phosphine by oxidizing the phosphine to cyanoethyl phosphine oxide, hydrolyzing the cyanoethyl 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.