Kim YM, Kwon TW, Chung SK, Barton DH. Photocleavage coupling reactions between cyclohexa-2,4-dienone sulfone derivatives and amines by visible light irradiation.
Bioorg Med Chem Lett 1999;
9:1175-8. [PMID:
10328308 DOI:
10.1016/s0960-894x(99)00153-5]
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Abstract
A stable sulfone derivative of 2,4,6-trimethylcyclohexa-2,4-diene-1-one (7) undergoes facile ring cleavage under visible light to produce a ketene intermediate, which could be efficiently captured by amines to give amides even in the presence of competing nucleophiles such as water and ethanol.
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