METHOD FOR OBTAINING DIETHYL ESTER OF @@@-4-2(3-TRET- BUTOXY-3-OXO-1- PROPENYL)PHENYL-1,4-DIHYDRO-2,6-DIMETHYL-3,5- PYRIDINEDICARBOXYLIC ACID

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to u0433u0435u0442u0435u0440u043eu0446u0438u043au043bu0438u0447u0435u0441u043au0438u043c u0441u043eu0435u0434u0438u043du0435u043du0438u00a0u043c, in particular to obtain u0434u0438u044du0442u0438u043bu043eu0432u043eu0433u043e ether [] - 4 - [2 - (3 - tert - u0431u0443u0442u043eu043au0441u0438 - 3 - jsoc - 1 - u043fu0440u043eu043fu0435u043du0438u043b) u0444u0435u043du0438u043b] - 1.4 - u0434u0438u0433u0438u0434u0440u043e - 2.6 - dimethyl - 3.5 - u043fu0438u0440u0438u0434u0438u043du0434u0438u043au0430u0440u0431u043eu043du043eu0432u043eu0439 acid, which lowers the u043au0440u043eu0432u00a0u043du043eu0435 pressure. the development mode of u043fu043eu043bu0443u0447u0435u043du0438u00a0 specified compounds.the reaction of tert butyl ether [are] - 3 - (2 - u0444u043eu0440u043cu0438u043bu0444u0435u043du0438u043b) - 2 - u043fu0440u043eu043fu0435u043du043eu0432u043eu0439 acid with u044du0442u0438u043bu043eu0432u044bu043c ether 3 with u0430u043cu0438u043du043eu043au0440u043eu0442u043eu043du043eu0432u043eu0439 acid (70) is (+ 30) in the presence of sour u0442u043du043eu0433u043e catalyst selected from the u0430u043bu043au0430u043du043eu0432u043eu0439 u0433u0430u043bu043eu0433u0435u043du0430u043bu043au0430u043du043eu0432u043eu0439 acid, acid salt, u043fu0438u0440u0438u0434u0438u043du0438u0435u0432u043eu0439 u0430u043bu043au0430u043du043eu0432u043eu0439 or u0433u0430u043bu043eu0433u0435u043du0430u043bu043au0430u043du043eu0432u043eu0439 acid, oxalic acid, alka u043du0441u0443u043bu044cu0444u043eu043du043eu0432u043eu0439 acidu0430u0440u0438u043bu0441u0443u043bu044cu0444u043eu043du043eu0432u043eu0439 acid or u0442u0435u0442u0440u0430u0433u0430u043bu043eu0433u0435u043du0431u043eu0440u043du043eu0439 acid.