Supported Lanthanum Borohydride Catalyzes CH Borylation Inside Zeolite Micropores
- U.S. DOE Ames Laboratory Iowa State University Ames IA 50011 USA
- U.S. DOE Ames Laboratory Iowa State University Ames IA 50011 USA, Department of Chemistry Iowa State University Ames IA 50011 USA
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.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1845726
- Journal Information:
- Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 15 Vol. 134; ISSN 0044-8249
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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