methyl 4-chloro-2-formylbenzoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To the mixture of 6-chlorooxindole (1.2 g, 7 mmol) and 4-chloro-2-formyl-benzoic acid methyl ester (1.4 g, 7 mmol) in methanol (10 mL) was added pyrrolidine (490 mg, 7 mmol) dropwise. The mixture was then heated at 70° C. for 3 h. After cooled to 4° C., the mixture was filtered and the precipitate was collected, dried to give a mixture of E/Z-6-chloro-3-(5-chloro-2-hydroxy-benzylidene)-1,3-dihydro-indol-2-one as a bright yellow solid (500 mg). After cooled to 4° C. the mixture was filtered the precipitate was collected dried to give

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 5-chloro-3-hydroxy-3H-isobenzofuran-1-one (10 g, 54 mmol) and iodomethane (80 g, 560 mmol) in dichloromethane (200 mL) was heated at reflux, then the heating bath was removed. To the above solution was added triethylamine (60 g) at a rate that maintained a brisk reflux. After the addition was completed, the mixture was allowed to cool to room temperature and stirred for 72 h. The mixture was purified by column chromatography to give the title product (1.5 g). at reflux the heating bath was removed To the above solution was added triethylamine (60 g) at a rate that maintained a brisk reflux After the addition The mixture was purified by column chromatography