Abstract
Abstract Irradiation of 1-methoxytriptycene 1(X = OCH3) in alcohols gives 2-(9-fluorenyl)benzaldehyde acetals 3 in good yield, showing the formation of 2-(9-fluorenyl)phenylmethoxycarbene 2(X = OCH3). In cyclohexane the expected internal adduct 4 is not obtained, but the photoproduct is 2-(9-fluorenyl)benzaldehyde 5. A novel homolysis of the O–CH3 bond in less electrophilic methoxycarbene 2 has been demonstrated.
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