Ether functionalized coumarin oxime ester compound as well as preparation and application thereof

The invention relates to an ether functionalized coumarin oxime ester compound shown in a formula (I), wherein variables are defined in the specification. The compound has good photosensitive absorption in a range of 300-550 nm, especially 365-450 nm, can rapidly undergo a photochemical reaction after absorbing light energy, initiates polymerization of a polymerizable monomer in several seconds, and enables the polymerization reaction to be completed in 10 minutes (especially 3 minutes). The photoinitiator has obvious advantages in the aspect of photosensitivity, and has good thermal stability, storage stability and solubility, thereby being suitable for being used as the photoinitiator for UV-VIS LED light source curing. The invention further relates to a preparation method and application of the ether functionalized coumarin oxime ester compound shown in the formula (I), and the compound can serve as a photoinitiator and is particularly suitable for UV-VIS LED light source curing. 本发明涉及一种式(I)的醚官能化香豆素肟酯类化合物，