Low temperature radical initiator system and processes making use thereof

Process for carrying out a chemical reaction, said process comprising reacting a compound capable of forming a chemical radical with a reaction partner at a temperature of below 100° C. in a radical reaction in the presence of reaction pair of an acid and of a compound of the general formula (I):

• wherein:
• X is selected from —OR1, —OC(O)R1, —OC(O)OR1, —OOR1, —NRR1, —SR1, —SSR1, —OP(O)(OR)(OR1), —OP(OR)(OR1), —N3, —NCO, —NCS, —CN, —N3 or halogen;
• R, R1 and R2 each independently represent H, alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, aralkyl, heteroaralkyl, acyl, sulfonyl, sulfinyl, phosphonate, phosphinate, silyl, silyloxy, each being optionally substituted by one or more groups selected from alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, heteroaryl, aralkyl, heteroaralkyl or heterosubstituent;
• or
• R1 and R2 form a cyclic 3 to 20 membered ring structure which may further be substituted by alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or heterosubstituent groups;
• each being optionally substituted by one or more groups selected from alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, heteroaryl, aralkyl, heteroaralkyl or heterosubstituent or comprises heteroatoms, optionally peroxygroup(s), within the cyclic structure;
• R3 is H, alkyl, cycloalkyl, heterocycloalkyl, aryl, alkenyl, alkynyl, heteroaryl, aralkyl, heteroaralkyl, acyl, sulfonyl, sulfinyl, phosphonyl, phosphinyl, silyl, silyloxyl, each being optionally substituted by one or more groups selected from alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, heteroaryl, aralkyl, heteroaralkyl or heterosubstituent;
• R3, R4 and R5 each independently represent H, alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or heterosubstituent groups;
• each being optionally substituted by one or more alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, heteroaryl, aralkyl, heteroaralkyl or a heterosubstituent, or any two of R3, R4 and R5 form a cyclic C2 to C20 hydrocarbon structure which may further be substituted by alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or heterosubstituent groups;
• each being optionally substituted by one or more groups selected from alkyl, cycloalkyl, heterocycloalkyl, alkenyl, alkynyl, heteroaryl, aralkyl, heteroaralkyl or heterosubstituent or comprise heteroatoms, optionally peroxygroup(s), within the cyclic structure, and the remaining of R3, R4 and R5 have the meaning as given before.