Category: Reaction

A. Eschenmoser et al., Helv. Chim. Acta 50, 708 (1967); J. Schreiber et al., ibid. 2101; M. Tanabe et al., Tetrahedron Letters 1967, 3943. Cleavage of α,β-epoxyketones under mild conditions, via sulfonylhydrazone intermediates, to yield acetylenic and carbonyl compounds: Early […]

H. Gutknecht, Ber. 12, 2290 (1879); 13, 1116 (1880). Cyclization of α-amino ketones, produced by reduction of isonitroso ketones to yield the dihydropyrazines which are dehydrogenated with mercury(I) oxide or copper(II) sulfate, or sometimes with atmospheric oxygen: I. J. Krems, […]