In the presence of dichloro-bis (benzonitrile) palladium, azidoformate reacts with various unsaturated ethers to give 1-alkoxy-1-carboalkoxyiminoalkanes. Reaction with 1-methyl-2- propenyl ether was accompaied by methyl migration, giving 1-alkoxy-1-carboalkoxyimino-2- methylpropane.