The zeolite‐supported lanthanide La(BH 4 ) x ‐HY 30 catalyzes C−H borylation of benzene with pinacolborane (HBpin), providing a complementary approach to precious, late transition metal‐catalyzed borylations. The reactive catalytic species are generated from La grafted at the Brønsted acid sites (BAS) in micropores of the zeolite, whereas silanoate‐ and aluminoate‐grafted sites are inactive under the reaction conditions. During typical catalytic borylations, conversion to phenyl pinacolborane (PhBpin) is zero‐order in HBpin concentration. A turnover number (TON) of 167 is accessed by capping external silanols, selectively grafting at BAS sites, and adding HBpin slowly to the reaction.
@article{osti_1845726,
author = {Li, Yuting and Kanbur, Uddhav and Cui, Jinlei and Wang, Guocang and Kobayashi, Takeshi and Sadow, Aaron D. and Qi, Long},
title = {Supported Lanthanum Borohydride Catalyzes CH Borylation Inside Zeolite Micropores},
annote = {Abstract The zeolite‐supported lanthanide La(BH 4 ) x ‐HY 30 catalyzes C−H borylation of benzene with pinacolborane (HBpin), providing a complementary approach to precious, late transition metal‐catalyzed borylations. The reactive catalytic species are generated from La grafted at the Brønsted acid sites (BAS) in micropores of the zeolite, whereas silanoate‐ and aluminoate‐grafted sites are inactive under the reaction conditions. During typical catalytic borylations, conversion to phenyl pinacolborane (PhBpin) is zero‐order in HBpin concentration. A turnover number (TON) of 167 is accessed by capping external silanols, selectively grafting at BAS sites, and adding HBpin slowly to the reaction. },
doi = {10.1002/ange.202117394},
url = {https://www.osti.gov/biblio/1845726},
journal = {Angewandte Chemie},
issn = {ISSN 0044-8249},
number = {15},
volume = {134},
place = {Germany},
publisher = {Wiley Blackwell (John Wiley & Sons)},
year = {2022},
month = {02}}