Patent ID: 8877971

Claim:
A process for preparing formamide compounds of formula (I): in which R 1 and R 2 represent independently of one another a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, a heterocycle, a silyl group, a siloxy group, an amino group, an aldimine of formula —N═CHR 6 , or a ketimine of formula —N═CR 6 R 7 , said alkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocycle, silyl, siloxy, and amino groups being optionally substituted, or R 1 and R 2 , together with the nitrogen atom to which they are bonded, form an optionally substituted heterocycle, or R 1 and R 2 , with the nitrogen atom to which they are bonded, form a carbon-nitrogen double bond (N═C), thus giving an aldimine of formula —N═CHR 6 or a ketimine of formula —N═CR 6 R 7 , and R 6 and R 7 represent independently of one another a hydrogen atom, an alkyl group, an alkenyl group, an akynyl group, an aryl group, a heteroaryl group, a heterocycle, a silyl group, a siloxy group, or an amino group, said alkyl, alkenyl, akynyl, aryl, heteroaryl, heterocycle, silyl, siloxy, and amino groups being optionally substituted, characterized in that an amine of formula (II) in which R 1 and R 2 are as defined above, is reacted with CO 2 in the presence of a catalyst and with a silane compound of formula (III) in which R 3 , R 4 and R 5 represent independently of one another a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, a silyl group, a siloxy group, an aryl group, or an amino group, said alkyl, alkenyl, alkynyl, alkoxy, silyl, siloxy, aryl, and amino groups being optionally substituted, or R 5 is as defined above and R 3 and R 4 , together with the silicon atom to which they are bonded, form an optionally substituted, silyl-containing heterocycle.