Syntheses of α-cyano substituted oximes from terpenic hydrocarbons via nitroso chlorides: X-ray structures of 3-cyanocaran-4-one oxime, 2-cyanopinan-3-one oxime and 1-cyano-p-menth-8-en-2-one oxime

(+)-3-Carene-, (S)-(–)-α-pinene- and (R)-(+)-limonene-derived α-nitroso chlorides on treatment with an excess of acetone cyanohydrin afford the corresponding α-cyano oximes, whose structure was solved by X-ray crystallography.