Borylation of o-Hydroxyphenyl phosphorus derivatives
摘要:
The reactions of isobutyl diphenylborate with O,O-diethyl o-hydroxyphenylphosphonate and o-hydroxyphenylphosphine gave 5,6-benzo-2-phenyl-4-ethoxy-4-oxo-1,3,2,4-dioxaboraphosphorinane and o-diphenylboryloxyphenylphosphine, respectively. The borylation only at the alpha-hydroxyalkyl fragments of bis(beta,beta,beta-trichloro-alpha-hydroxyethyl)(o-hydroxyphenyl)phosphine and the conversion of the o-boryloxyphenyl phosphorus derivative to an alpha-boryloxyalkyl derivative upon the action of chloral indicates the greater stability of compounds with the P-C-O-B fragment than that for compounds with the P-C-C-O-B fragment.