Aldehydes in excellent yields were obtained from the ruthenium–porphyrin-catalyzed oxidation of various terminal alkenes with 2,6-dichloropyridine N-oxide under mild conditions. The aldehydes generated from these ruthenium-catalyzed alkene oxidations can be used in situ for olefination reactions with ethyl diazoacetate in the presence of PPh3 in a one-pot diazoacetate olefination starting from alkenes (see example).
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