(11bR)-2,6-Bis(3,5-dichlorophenyl)-4-hydroxy-4-oxide-dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin, 95% (99% ee)

(11bR)-2,6-Bis(3,5-dichlorophenyl)-4-hydroxy-4-oxide-dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin, 95% (99% ee)