Patent ID: 8481726

Claim:
A process for the preparation of a sterically hindered nitroxyl ether of formula (I) or (II) wherein N4-amine is n is a number from 1 to 10 and R 1 is C 1 -C 5 alkyl; which process comprises in the case of the sterically hindered nitroxyl ether of formula (I) the steps a) reacting a compound of formula (Ia) with n-hexylaldehyde, n-pentylaldehyde, n-butyraldehyde, n-propylaldehyde or acetaldehyde and a hydroperoxide in the presence of a metal catalyst; or b1) reacting a compound of formula (Ib) with n-hexylaldehyde, n-pentylaldehyde, n-butyraldehyde, n-propylaldehyde or acetaldehyde or a mixture of said aldehydes with their respective alcohols and a hydroperoxide in the presence of a metal catalyst to yield a compound of formula (Ic), which is further reacted to form a compound of formula (I); and which process comprises in the case of the sterically hindered nitroxyl ether of formula (II) a) reacting a compound of formula (IIa) or (IIb) with a compound of formula (100) or (200) and a hydroperoxide in the presence of a metal catalyst to yield a compound of formula (IIc), (IId), (IIe) or (IIf), which are further reacted to form a compound of formula (II).