反应详情

More specifically, following Tetrahedron Letters, 31, 6321-6324 (1990), trifluoromethanesulfonic anhydride (4) is reacted with 1,1-bi-2-naphthol (3) to form 2,2'-bis(trifluoromethanesulfonyloxy)-1,1'-binaphthyl (5). This compound (5) is reacted with phosphine oxide (6) in the presence of a palladium catalyst to form 2-phosphinyl-2'-trifluoromethanesulfonyloxy-1,1'-binaphthyl (7). Compound (7) is then reduced in the presence of triethylamine, followed by hydrolysis of the reduction product to form 2-phosphino-2'-hydroxy-1,1'-binaphthyl (8). Further, this compound (8) is reacted with chlorophosphine (9) in the presence of triethylamine, whereby the phosphine compound (I) of the present invention is prepared.

1. customfollowed by hydrolysis of the reduction product