Patent ID: 7723529

Claim:
A process for preparing compounds of general formula (III) comprising reacting: (a) a compound of formula (I) R A —H, and (I) (b) a compound of formula (II) in the presence of dimethylaminopyridine (DMAP), or dimethylaminopyridine (DMAP) and a Lewis acid selected from the group consisting of bismuth triflate and scandium triflate, wherein: in formula (I), R A is selected from the group consisting of: in formula (II), t is 0 or 1 W is selected from the group consisting of: Y is a bivalent radical having the following meanings: a) a straight or branched C 1 -C 20 alkylene, optionally substituted with one or more of the substituents selected from the group consisting of: halogen atoms, hydroxy, —ONO 2 and T 0 , wherein T 0 is —OC(O)—(C 1 -C 10 alkyl)-ONO 2 or —O—(C 1 -C 10 alkyl)-ONO 2 ; or a cycloalkylene having from 5 to 7 carbon atoms, wherein the cycloalkylene is optionally substituted with T, wherein T is a straight or branched alkyl with from 1 to 10 carbon atoms; or wherein: n is an integer from 0 to 20, n1 is an integer from 1 to 20, n2 is 0 or 1; wherein the —ONO 2 group is linked to —(CH 2 ) n1 — group; wherein the —ONO 2 group is linked to the —(CH 2 ) n6 — group; wherein the —ONO 2 group is linked to the —(CH(R 7 )— group; and wherein X 2 is O or S, n3, n4 and n6 are integer independently selected from 0 to 20, n5 is an integer from 0 to 6, R 6 is H, CH 3 or nitrooxy group, R 7 is CH 3 or nitrooxy group, wherein: n7 is an integer from 0 to 10; n8 is an integer from 1 to 10; R 8 R 9 , R 10 , R 11 are the same or different, and are H or straight or branched C 1 -C 4 alkyl; wherein the —ONO 2 group is linked to wherein n8 is as defined above Y 2 is selected from the group consisting of: in formula (III), t, R A and X are as above defined.