학술논문
Synthese primärer und sekundärer Phosphane durch selektive Alkylierung von PH3 unter Phasentransferbedingungen / Synthesis of Primary and Secondary Phosphines by Selective Alkylation of PH3 under Phase Transfer Conditions
Document Type
research-article
Source
Zeitschrift für Naturforschung B. 45(2):203-211
Subject
Language
English
ISSN
1865-7117
0932-0776
0932-0776
Abstract
Primary phosphines, RPH2, may be synthesized selectively by alkylation of phosphine, PH3, with alkyl halides RX (R = Me, Et, n-Bu, 2-Bu, C16H33, CH2=CH–CH2, Ph–CH2, 2-Py–CH2–CH2; X = Cl, Br) and concentrated aqueous KOH as auxilliary base in dimethylsulfoxide as a solvent or in two phase systems employing phase transfer catalysts. Under more rigorous conditions secondary phosphines R2PH (R = Me, n-Bu, CH2=CH–CH2) are also accessible in good yields. Using 1,3-dibromo(chloro)-propane or -butane diprimary phosphines H2P–(CH2)2–CHR–PH2 (R = H, Me) are obtained, while 1,4-dibromopentane in a high yield cyclization reaction leads to 2-methylphospholane (12) with a chiral C-atom in a-position.