Platinum(0)-Catalyzed Indolyne Insertion into Bis(pinacolato)diboron Followed by Site-Selective Suzuki–Miyaura Cross-Coupling
Author(s) -
Manish Pareek,
Thomas Fallon,
Martin Oestreich
Publication year - 2015
Publication title -
organic letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.94
H-Index - 239
eISSN - 1523-7060
pISSN - 1523-7052
DOI - 10.1021/acs.orglett.5b00604
Subject(s) - chemistry , regioselectivity , indole test , boron , catalysis , coupling reaction , combinatorial chemistry , suzuki reaction , platinum , medicinal chemistry , coupling (piping) , stereochemistry , palladium , organic chemistry , mechanical engineering , engineering
Indolynes are converted into previously unprecedented indole building blocks by platinum(0)-catalyzed insertion into a symmetrically substituted boron-boron bond. The two boron sites in these indoles must be differentiated in a subsequent step, and the 6,7-bis[(pinacolato)boryl]indole was shown to undergo site-selective Suzuki-Miyaura cross-coupling with perfect C7 selectivity. The net reaction is the regioselective installation of two different substituents in the C6 and C7 positions of a 6,7-indolyne precursor.
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