An Expedient Synthesis of Dialkylphosphane-Borane Complexes from Sodium Phosphide, and Their Alkylation under Phase-Transfer Conditions
作者:Peter Kasák、Michael Widhalm
DOI:10.1055/s-2007-990777
日期:2007.10
A group of seven achiral, α- and β-chiral dialkylphosphanes were synthesized in one step from sodium phosphide and alkyl sulfonates or sulfates. The corresponding borane complexes were further alkylated with alkyl, allyl, and benzyl bromides and mesylates to give tertiary mono- and diphosphanes, either via lithium phosphide-borane complexes at low temperature (45-78%) or under phase-transfer conditions (79-91%).
通过一步法,从磷化钠和烷基磺酸盐或硫酸盐中合成了七种非手性的α-和β-手性二烷基膦烷。相应的硼烷配合物进一步与烷基、烯丙基和苄基溴化物和甲磺酸酯进行烷基化,得到三级的单膦和双膦化合物,既可以通过低温下的磷化锂-硼烷配合物(产率45-78%)制备,也可以在相转移条件下(产率79-91%)制备。