α‐Amino Acetals: 2,2‐Diethoxy‐2‐(4‐Pyridyl)Ethylamine

α-Amino acetals: 2,2-diethoxy-2-(4-pyridyl)ethylamine reactant: Hydroxylamine hydrochloride (25.0 g, 0.36 mol) reactant: 4-acetylpyridine (36.3 g, 0.30 mol) intermediate: E- and Z-isomers of 4-acetylpyridine oxime intermediate: E-4-acetylpyridine oxime product: 2,2-Diethoxy-2-(4-pyridyl)ethylamine. intermediate: E)-4-acetylpyridine tosylate (55.1 g, 0.19 mol Keywords: acetal (and thioacetal) formation; rearrangements; sulfonation, O-sulfonation; p-toluenesulfonyl chloride; potassium