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Synthesis of benzylboranes

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Rh-catalyzed B-H bond insertion of carbenes generated in situ from tosylhydrazones into stable borane adducts enables a promising method for organoborane synthesis. In addition, by using chiral dirhodium catalysts, an asymmetric version of the reaction with very good enantioselectivities was achieved. The products could be easily transformed into chiral alcohols and other widely used organoboron reagents with enantiomeric fidelity.
Y. Pang, Q. He, Z.-Q. Li, J.-M. Yang, J.-H. Yu, S.-F. Zhu, Q.-L. Zhou, J. Am. Chem. Soc., 2018, 140, 10663-10668.


Rh-catalyzed B-H bond insertion of carbenes generated in situ from tosylhydrazones into stable borane adducts enables a promising method for organoborane synthesis. In addition, by using chiral dirhodium catalysts, an asymmetric version of the reaction with very good enantioselectivities was achieved. The products could be easily transformed into chiral alcohols and other widely used organoboron reagents with enantiomeric fidelity.
Y. Pang, Q. He, Z.-Q. Li, J.-M. Yang, J.-H. Yu, S.-F. Zhu, Q.-L. Zhou, J. Am. Chem. Soc., 2018, 140, 10663-10668.