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Vinyl Carbocations Generated under Basic Conditions and Their Intramolecular C-H Insertion Reactions.

ABSTRACT: Here we report the surprising discovery that high-energy vinyl carbocations can be generated under strongly basic conditions, and that they engage in intramolecular sp3 C-H insertion reactions through the catalysis of weakly coordinating anion salts. This approach relies on the unconventional combination of lithium hexamethyldisilazide base and the commercially available catalyst, triphenylmethylium tetrakis(pentafluorophenyl)borate. These reagents form a catalytically active lithium species that enables the application of vinyl cation C-H insertion reactions to heteroatom-containing substrates.

SUBMITTER: Wigman B

PROVIDER: S-EPMC6608570 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Vinyl Carbocations Generated under Basic Conditions and Their Intramolecular C-H Insertion Reactions.

Wigman Benjamin B Popov Stasik S Bagdasarian Alex L AL Shao Brian B Benton Tyler R TR Williams Chloé G CG Fisher Steven P SP Lavallo Vincent V Houk K N KN Nelson Hosea M HM

Journal of the American Chemical Society 20190529 23

Here we report the surprising discovery that high-energy vinyl carbocations can be generated under strongly basic conditions, and that they engage in intramolecular sp<sup>3</sup> C-H insertion reactions through the catalysis of weakly coordinating anion salts. This approach relies on the unconventional combination of lithium hexamethyldisilazide base and the commercially available catalyst, triphenylmethylium tetrakis(pentafluorophenyl)borate. These reagents form a catalytically active lithium ...[more]

PMID: 31082208

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