e formula II and reacting this with chloroacetyl chloride as described above.The water of reaction formed during preparation of the Schiff base is advantageously removed by azeotropic distillation with a conventional entraining agent, e.g. a hydrocarbon, such as n-pentane, n-hexane, cyclohexane, benzene, toluene, xylene,methylene chloride or chloroform.The hydrogenation of the Schiff base is carri