CPC C07D 213/89 (2013.01) [C07C 215/08 (2013.01)] | 16 Claims |
1. A process comprising the steps of:
(a) providing a solution comprising:
(i) at least one solvent, wherein the solvent is selected from the group consisting of ethanol, methanol, and mixtures thereof;
(ii) at least one acid;
(iii) at least one compound according to Formula (1)
wherein
R1 is selected from the group consisting of H, a non-substituted or halogen-substituted, branched or unbranched C1-C20-alkyl radical, a non-substituted or halogen-substituted C5-C8-cycloalkyl radical, a non-substituted or halogen-substituted C8-C10-aryl radical or a non-substituted or halogen-substituted, branched or unbranched C7-C20-aralkyl radical;
R2 is either O or S,
R3 is H or a branched or unbranched C1-C4-alkyl radical;
A1 is selected from the group consisting of H, a non-substituted halogen-substituted, branched or unbranched C1-C20-alkyl radical, a non-substituted or halogen-substituted C5-C8-cycloalkyl radical, a branched or unbranched hydroxylated C1-C20-alkyl radical;
A2 is selected from the group consisting of H, a non-substituted halogen-substituted, branched or unbranched C1-C20-alkyl radical, a non-substituted or halogen-substituted C5-C8-cycloalkyl radical, a branched or unbranched hydroxylated C1-C20-alkyl radical;
A3 is selected from the group consisting of H, a non-substituted halogen-substituted, branched or unbranched C1-C20-alkyl radical, a non-substituted or halogen-substituted C5-C8-cycloalkyl radical, a branched or unbranched hydroxylated C1-C20-alkyl radical;
(b) heating the solution to at least 35° C.; and
(c) recovering a compound according to Formula (2)
wherein
R1x is selected from the group consisting of H, an unsubstituted or halogen-substituted, branched or unbranched C1-C20-alkyl radical, an unsubstituted or halogen-substituted C5-C8-cycloalkyl radical, an unsubstituted or halogen-substituted C8-C10-aryl radical or an unsubstituted or halogen-substituted, branched or unbranched C7-C20-aralkyl radical;
R2x is either O or S,
R3x is H or a branched or unbranched C1-C4-alkyl radical.
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