作者:Chunfang Jiang、Olivier Blacque、Heinz Berke
DOI:10.1021/om9008636
日期:2010.1.11
The reactions of frustrated Lewis pairs (FLPs) derived from B(C6F5)3 and the bulky Lewis bases 2,2,6,6-tetramethylpiperidine (TMP), tri-tert-butylphosphine, and lutidine (Lut) with terminal alkynes (acetylene, phenylacetylene, 3-ethynylthiophene) were investigated. The FLPs TMP···B(C6F5)3,t-Bu3P···B(C6F5)3 and Lut···(C6F5)3 reacted with acetylene (HC≡CH) to yield the apparently thermodynamically more
受挫路易斯双(FLP信号)为B(C导出的反应6 ˚F 5)3和笨重的路易斯碱-2,2,6,6-四甲基哌(TMP),三-叔丁基膦,和二甲基吡啶(甩)与终端研究了炔烃(乙炔,苯乙炔,3-乙炔基噻吩)。FLP TMP ···(C 6 F 5)3,t- Bu 3 P···B(C 6 F 5)3和Lut ···(C 6 F 5)3与乙炔(HC≡CH)反应生成明显热力学更稳定的E异构体[ TMP H] [(C 6 F 5)2 B-C(C 6 F 5)═C(H)B(C 6 F 5)3 ](1- E),t- Bu 3 PC(H)═C(H)B(C 6 F 5)3(2- E ; 90%)和[ t- Bu 3 PH] [(C 6 F 5)2 B-C(C 6 F 5)═C(H)B(C 6 F 5)3 ](3- E ; 10%)和Lut C(H)═C(H)B(C 6 F 5)3(4- E) 。乙炔反应的机械途径建议从形成弱的B(C