The reaction of naphthoquinone-oximes (3) and (4) with diazomethane yields directly, in one step, the oxazoles (5) and (6), respectively.
CITATION STYLE
Emery, F. D. S., Silva, R. S. F., De Moura, K. C. G., Pinto, M. C. F. R., Amorim, M. B., Malta, V. R. S., … Pinto, A. V. (2007). 1,4- Addition of diazomethane to a heterodiene: A direct preparation of the oxazolic ring. Anais Da Academia Brasileira de Ciencias, 79(1), 29–33. https://doi.org/10.1590/S0001-37652007000100004
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