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.
Stephan, Douglas W.
中科院分区:
化学2区
文献类型:
--
作者:
LaFortune, James H. W.;Qu, Zheng-Wang;Stephan, Douglas W.

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本文报道了一系列膦基硼烷,包括R(2)PBpin(R=Ph,tBu; pin=频哪醇),R(2)PBMes(2)(R=Ph,tBu; Mes= 2,4,6-Me-3-C6 H2)和R(2)PBcat(R=Ph,tBu,Mes; cat=邻苯二酚)与CO2的反应。虽然R(2)PBpin和R(2)PBMes(2)分别得到R(2)PCO(2)Bpin(R=Ph 1,tBu 4)和R(2)PCO(2)BMes(2)(R=Ph 2,tBu 3)的产物,但R(2)PBcat导致进一步反应,得到(R2 P)(2)CO(R=Ph 5,tBu 6,Mes 7)和O(Bcat)(2).计算研究提供了深入的机制,揭示了一个中间体来自双膦硼化的二氧化碳。
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.