Cuproussiloxane as two self-assemblies, Cu20O20Si10Me10R10 and Cu24O24Si12Me12R12, with catalytic property. Issue 33 (9th August 2022) - Jiang, Wenjun
Abstract : A cuproussiloxane is prepared and utilized to catalyze the aerobic C–P coupling of terminal alkynes with H-phosphonates to alkynylphosphonates. Abstract : Cuproussiloxane (1) was prepared from the reaction of silanediol R(Me)Si(OH)2 (R = N(SiMe3 )(2, 6- i Pr2 C6 H3 )) and (CuMes)4 (Mes = 2, 4, 6-Me3 C6 H2 ). The prepared compound crystalizes into two self-assemblies: Cu24 O24 Si12 Me12 R12 ([(CuO)2 Si(Me)R]12, 1a ) and Cu20 O20 Si10 Me10 R10 ([(CuO)2 Si(Me)R]10, 1b ). 1a and 1b feature dodecagonal and decagonal prism X-ray structures, respectively. 1 was found to exhibit good to excellent activity for catalyzing the aerobic C–P cross-coupling reaction of terminal alkynes with H-phosphonates to form alkynylphosphonates (70–99% yields).