Optical resolution of 2,2'-bis(diphenylphosphino)-1,1'-binaphthyldioxide.

摘要

d-2,2 min -bis(diphenylphosphonino)-1,1 min -binaphthyldioxide and 1-2,2 min -bis(diphenylphosphino)-1,1 min -binaphthyldioxide are produced by reacting dl-2,2 min -bis(diphenylphosphino)-1,1 min -binaphthyldioxide with optically active camphor-10-sulfonic acid or optically active 3-bromo-camphor-10-sulfonic acid as a resolving agent in a lower alkyl ester of acetic acid containing a lower alkyl carboxylic acid, thereby forming diastereoisomeric salts, and optically resolving the diastereoisomeric salts.