Simple Access to Tungsten-Stabilized Disecondary Diphosphines
journal contributionposted on 18.02.2016, 16:07 by Rongqiang Tian, Yanbo Mei, Zheng Duan, François Mathey
Transient terminal phosphinidene complexes [RP-W(CO)5] dimerize in the presence of copper chloride, and the dimers react in situ with triphenylphosphine–borane to give the disecondary diphosphine complexes [RPH–PHR][W(CO)5]2. When R = CH2CH2Cl, a cyclization takes place to give the diphosphirane complex. A 1,2-diphospholane is obtained for R = Ph by further reaction with 1,3-dibromopropane in the presence of aqueous K2CO3.