One pot synthesis of urea (meth)acrylates

A one pot process for preparing at least one (meth)acrylate of the general formula (I)

• wherein
• R1 is selected from the group consisting of —H and -Me;
• R2 is selected from the group consisting of —H and a C1-C20 linear, branched or cyclic alkyl or aryl group;
• R2′ is —H;
• R3 is selected from the group consisting of —H;
• a C1-C20 linear, branched or cyclic alkyl or aryl group;
• benzene-sulfonyl;
• tosyl;
• p-chlorophenyl;
• adamantyl;
• 2,6-dimethyl phenyl;
• 3,5-dimethyl phenyl;
• and 2,6-dipropyl phenyl;
• R2 and R3 are the same or different;
• X is selected from the group consisting of —O— and —NH—;
• and
• L is a C2-C20 linear, branched or cyclic alkyl or aryl group, in which optionally, one or more carbon atoms within the carbon chain is replaced by one or more —O—, —NH— or —S— heteroatoms,
• the process comprising:
• reacting, in an initial reaction phase, an aminoalcohol or diamine of the general formula (V)
• wherein X, R2, L are as defined above,
• with an isocyanate of the general formula (VI)
• wherein R3 is as defined above,
• in the presence of a reactive diluent of the general formula (III)
• wherein R4 is C1 to C4 alkyl,
• to obtain, in situ, an intermediate compound of the general formula (II)
• wherein X, R2, R2′, R3, L are as defined above;
• and
• immediately reacting, in a second reaction phase, the intermediate compound with the reactive diluent, to form the at least one (meth)acrylate.