Amador AG, Sherbrook EM, Lu Z, Yoon TP. A general protocol for radical anion [3 + 2] cycloaddition enabled by tandem Lewis acid photoredox catalysis.
SYNTHESIS-STUTTGART 2018;
50:539-547. [PMID:
29568140 DOI:
10.1055/s-0036-1591500]
[Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report herein a method for intermolecular [3 + 2] cycloaddition between aryl cyclopropyl ketones and alkenes involving the combination of Lewis acid and photoredox catalysis. In contrast to other more common methods for [3 + 2] cycloaddition, these conditions operate using a broad range of both electron-rich and electron-deficient reaction partners. The critical factors predicting the success of these reactions is the redox potential of the cyclopropyl ketone and the ability of the alkene to stabilize a key radical intermediate.
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