Double Phosphinoboration of CO2: A Facile Route to Diphospha-Ureas
Double Phosphinoboration of CO2: A Facile Route to Diphospha-Ureas
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DOI:
10.1002/chem.201903407
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发表时间:
2019-08-23
影响因子:
4.3
通讯作者:
Stephan, Douglas W.
中科院分区:
文献类型:
--
作者:
LaFortune, James H. W.;Qu, Zheng-Wang;Stephan, Douglas W.
The reactions of CO2 with a series of phosphinoboranes, including R(2)PBpin (R=Ph, tBu; pin=pinacol), R(2)PBMes(2) (R=Ph, tBu; Mes=2,4,6-Me-3-C6H2), and R(2)PBcat (R=Ph, tBu, Mes; cat=catechol) are described. Although R(2)PBpin and R(2)PBMes(2) afford products of the form R(2)PCO(2)Bpin (R=Ph 1, tBu 4) and R(2)PCO(2)BMes(2) (R=Ph 2, tBu 3), respectively, R(2)PBcat lead to further reaction affording the diphospha-ureas, (R2P)(2)CO (R=Ph 5, tBu 6, Mes 7), together with O(Bcat)(2). Computational studies provide insight into the mechanism, revealing an intermediate derived from double phosphinoboration of CO2.