Bisacylphosphanes and their use as photoinitiators; process for preparing acylphosphanes

The invention relates to a method for preparing a method for the acyl and cyclopentane, n and m each independently is 1 or 2; andFORMULA, wherein n=1, or is a C1-C18 alkyl or C2-C18 olefin and substituted such as blended textile, or FORMULA, FORMULA, wherein n is; the monoradical are groups of such as defined above; Compound of such as C1-C18 alkyl, the C3-C12 cycloalkyl, the C2-C18 olefin claim 2,4,6, wherein trimethylphenyls, wherein and; R3 is one of groups of R1, r2Wherein the method comprises the following steps: a) and is a catalyst in the presence of a element phosphorus in solvent [(] ∞ P, Hal (3) and reducing metal material, wherein the metal Me3P or or Me'3 Method, A is an alkali - metal and A agent is the alkali - metal, to obtain the metal multi-phosphides, b) optionally in a catalyst or the following, wherein the protonic source optionally, wherein the metal or dihydrogen phosphate, MePH2c) and then performing the acylation reaction or the formula I m=1 replaced by the formula III (a or is IV's carboxylic ester of formula IV) ether wherein the reaction otherwise, and then with a formula III (a reaction or -, comprising the alcohol is the Compound according to any one of; d) alkylate reaction, and then performing the reaction with other by a kit R1Hal or a antistatic agent, to obtain the compound of formula I. A then performing the oxidation step, wherein the compound is the acyl and a compound oxide or the glass and acyl and hydrogen sulphide, which is used as of the initiator.