Abstract: The invention relates to novel compounds of formula (I): in which R1, R2 and R3, identical or different, independently represent: hydrogen a halogen a C1 to C15 hydroxy or hydroxyalkyl group a C1 to C15 linear or branched alkyl group a, b and c independently lying between 0 and 5. R4 is linked to the naphthalene unit at position 1, 2 or 3 via a —CH2—O— bond and represents: either a divalent group which is (co)polymerisable with a monomer; in which case d lies between 1 and 3 or a monovalent group which is (co)polymerisable with a monomer; in which case d is equal to 2 or 3 and R5 is linked to the naphthalene unit at position 1, 2 or 3 and represents: hydrogen, a halogen, a C1 to C15 hydroxyalkyl group, a C1 to C15 linear or branched alkyl group, and e is an integer lying between 0 and 2 and such that d+e=3. It also relates to the method for synthesising these compounds and to their use for the manufacture of photochromic or photosensitive polymers.

Abstract: The invention relates to novel compounds of the following formula, in which R1, R2 and R3, identical or different, independently represent hydrogen, a halogen, a Cl to C15 hydroxy or hydroxyalkyl group, and/or a C1 to C15 linear or branched alkyl group. R4 is linked to the naphthalene unit at position 1, 2 or 3 via a —CH2—O— bond and R5 is linked to the naphthalene unit at position 1, 2 or 3 and e is an integer lying between 0 and 2 and such that d+e=3. It also relates to the method for synthesizing these compounds and to their use for the manufacture of photochromic or photosensitive polymers.