Patent ID: 6410628
Filing Date: 2002-06-25
Classification: B33Y,C07D,C08K,C08L

Abstract:
A process for preparing a photolatent base compound of the formula II, R1 is an aromatic or heteroaromatic radical which is capable of absorbing light in the wavelength range from 200 to 650 nm and in doing so brings about cleavage of the adjacent carbon-nitrogen bond; R2 and R3 independently of one another are hydrogen, C1-C18alkyl, C3-C18alkenyl, C3-C18alkynyl or phenyl and, if R2 is hydrogen or C1-C18alkyl, R3 is additionally a group â€”COâ€”R14 in which R14 is C1-C18alkyl or phenyl; or R1 and R3, together with the carbonyl group and the C atom to which R3 is attached, form a benzocyclopentanone radical; R5 is C1-C18alkyl or NR15R16; R15 and R16 independently of one another are hydrogen or C1-C18alkyl; R4 and R6 together form a C2-C12alkylene bridge; R5 and R7 together, independently of R4 and R6, form a C2-C12alkylene bridge or, if R5 is NR15R16, R16 and R7 together form a C2-C12alkylene bridge; which comprises reacting a compound of the formula V with a compound of the formula VI in which R1, R2, R3, R4, R5, R6 and R7 are as defined above and Halogen is F, Cl, Br or I.