| 摘要 |
Prepn. of phosphines of formula R2R3P-R1 (I) comprises reaction of a diaryl phosphine of formula R2R3P-X (II) and a reducing agent and a quat. ammonium cpd. of formula R1-N<+>R4R5R6 (III). In the formulae, R1 = 1-10C alkyl, 3-10 cycloalkyl or C(Y,Z)Aryl; Y,Z = H or 1-4C alkyl; Aryl = phenyl, naphthyl, anthracenyl, phenanthrenyl, biphenyl or binaphthyl; and where the (cyclo)alkyl gps. can be subst. with CN, O(1-4C alkyl, CO(1-4 C) alkyl, COO(1-4 C) alkyl or -CH2-CH2-(1-10 C)-polyfluoroalkyl, the cycloalkyl gps. can contain -O- or -S- members in the rings, and the aryl rings can be substd. by CO(1-4 C) alkyl, COO(1-4 C) alkyl, CN, halogen, CO(1-4 C) alkyl, COO(1-4 C)alkyl, -CH2-CH2- (1-10 C) polyfluoroalkyl, -CH2-PR2R3 or -CH2-N<+>R4R5R6; R2,R3 = phenyl, naphthyl, anthracenyl opt. substd. with halogen, 1-4 C alkyl or alkoxy; R4, R5, R6 = 1-12 C alkyl; R4 and R5 = 5 or 6 membered ring opt. contg. an N, O, or S atom; or R4, R5 and R6 = a bicyclic ring system with nitrogen as a bridging atom and opt. contg. further N, S or O atoms in the ring; X = bromine, fluorine, 1-4 C alkoxy or o-phenyl; and A = an anion of an organic or inorganic acid. |
