C-Alkylation of nitroso chlorides with diethyl malonate: the X-ray structure of diethyl (±)-(1 R ,2 S ,5 R )-2-{3( E)-hydroxyimino-2,6,6-trimethylbicyclo[3.1.1]-hept-2-yl}malonate

The reactions of the nitroso chlorides of methylcyclohexene, limonene, 3-carene, and α-pinene with an excess of diethyl malonate in the presence of anhydrous K 2CO 3 at room temperature resulted in the C-alkylation and formation of α-substituted oximes with a diethyl malonate moiety in 20–90% yields.