Preshlock SM, Plattner DL, Maligres PE, Krska SW, Maleczka RE, Smith MR. A traceless directing group for C-H borylation.
Angew Chem Int Ed Engl 2013;
52:12915-9. [PMID:
24222178 DOI:
10.1002/anie.201306511]
[Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/26/2013] [Indexed: 11/12/2022]
Abstract
Not a trace: Borylation of the nitrogen in nitrogen heterocycles or anilines provides a traceless directing group for subsequent catalytic C-H borylation. Selectivities that previously required Boc protection can be achieved; furthermore, the NBpin directing group can be installed and removed in-situ, and product yields are substantially higher. Boc=tert-butoxycarbonyl, pin=pinacolato.
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