反应详情

The general procedure of Example 23, Step A was repeated, except that the 3,3-bis(4-fluorophenyl)-2-[1-(1-methylethyl)-1H-tetrazol-5-yl]-2-propenal utilized therein was replaced by 3,3-bis(4-fluorophenyl)-2-[2-(1-methylethyl)-2H-tetrazol-5-yl]-2-propenal and there was thereby produced mostly 5,5-bis(4-fluorophenyl)-4-[2-(1-methylethyl)-2H-tetrazol-5-yl]-2,4-pentadienal in 82% yield; MS (CI): m/e=381 for (M+H)+. This product was then subjected to the general procedure of Example 23, Step B and there was thereby produced ethyl 9,9-bis(4-fluorophenyl)-5-hydroxy-8-[2-(1-methylethyl)-2H-tetrazol-5-yl]-3-oxo-6,8-nonadienoate containing some inseparable ethyl 7,7-bis(4-fluorophenyl)-5-hydroxy-6-[2-(1-methylethyl)-2H-tetrazol-5-yl]-3-oxo-6heptenoate in 69.7% yield.