PURPOSE: To prepare novel compounds useful as a catalyst.
CONSTITUTION: The sulfonated 2,2'-bis(diphenylphosphinomethyl)-1,1'- binaphthalenes of the formula I [wherein Ar is the formula II (wherein M is H, ammonium or the like); Ph is a phenyl radical; (m) is 1 or 2; (n) is 1 or 2] are provided. The compounds of the formula I are prepared, for example, by sulfonating 2,2'-bis(diphenylphosphinomethyl)-1,1'-binaphthalenes with fuming sulfuric acid containing from 10 to 65 wt.% of free sulfur trioxide at 0 to 25°C, by hydrolyzing the sulfonated mixture at up to about 30°C, then neutralizing with alkali carbonate or alkali hydroxide, separating alkali sulfate, concentrating and extracting them with a mixture of C1-5 alcohol and water from the residue.
RAINAA MANETSUTSUBERUGAA
HERUMUUTO BAARUMAN
KURISUTEIAN KOORUPAINTONAA
PEETAA RATSUPE