2,4,6-Trimethylbenzyl Cyanide

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:0.00; pressure:0.00; stir:

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:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

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

実験手順: To a stirred mixture of sodium methoxide (2.78 g, 51 mmol) and ethyl formate (4.0 g, 54 mmol) in 100 mL of benzene was added 2,4,6 trimethylphenylacetonitrile (8.0 g, 50 mmol) over 5 min. After stirring for an additional hour it was treated with water (100 mL) and the layers were separated. The aqueous layer was separated and acidified with 10% HCl and extracted with ethyl acetate. After drying the solvent was removed in vacuo to afford a-formyl-2,4,6-trimethylphenylacetonitrile as colorless crystals melting at 120-122° C. the layers were separated The aqueous layer was separated extracted with ethyl acetate After drying the solvent was removed in vacuo

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

実験手順: A mixture of 2,4,6-trimethylbenzyl cyanide (1.0 g, 6.3 mmol), benzyl azide (0.92 g, 6.9 mmol) and potassium t-butoxide (0.78 g, 6.9 mmol) in tetrahydrofuran (10 mL) was stirred at ambient temperature for 2.5 days. The resulting suspension was diluted with water and extracted three times with ethyl acetate. The combined organic layers were dried over MgSO4 and filtered. Solvent was removed in vacuo to give a brown oil. Trituration with ether and filtration afforded a yellow solid (1.12 g, 61% yield): NMR (CDCl3, 300 MHz): 7.60-7.30 (m, 5H), 7.30-7.20 (m, 2H), 5.50 (s, 2H), 3.18 (br s, 2H), 2.30 (s, 3H), 2.10 (s, 6H); CI-MS: 293 (M+H). extracted three times with ethyl acetate The combined organic layers were dried over MgSO4 filtered Solvent was removed in vacuo to give a brown oil Trituration with ether and filtration

反応条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 2,4,6-trimethylphenylacetonitrile (75 g) and ethyl formate (67 g) in 225 ml absolute ethanol was treated with solid sodium ethoxide (36 g) in small portions over 10 minutes, with good stirring. The mixture was heated to 60° C. under nitrogen for 16 hours, was allowed to cool to room temperature, and then poured into 1.2 l of water. This mixture was extracted with ether. The aqueous phase was acidified with 6M HCl to pH 1 and extracted with ethyl acetate. The ethyl acetate extracts were combined, washed with water and brine, dried and concentrated to give 46 g of 3-hydroxy-2-(2′,4′,6′-trimethylphenyl)acrylonitrile (intermediate 2). A sample was crystallized from ether/hexane to give colorless crystals, melting point=124-126° C. to cool to room temperature This mixture was extracted with ether extracted with ethyl acetate washed with water and brine dried concentrated

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反応条件: temp:0.00; pressure:0.00; stir: