Ethyl chlorocarbonate‐¹⁴C and its application to the synthesis of N‐methyl‐¹⁴C‐amines

A convenient method for the preparation of ethyl chlorocarbonate‐ 14 C is described. This has led to a facile synthesis of N‐methyl‐ 14 C secondary amines by lithium aluminum hydride reduction of an intermediate 14 C‐carbamate. The reaction has also been employed in the preparation of N‐methyl‐ 2 H 3 ‐ and N‐methyl‐ 3 H‐amines by using lithium aluminum hydride‐ 2 H 4 and lithium aluminum hydride‐ 3 H.