反应详情

Phenylmethanol (6.72 g, 62.2 mmol) was added dropwise to a suspension of sodium hydride (60% suspension in mineral oil; 2.486 g, 62.2 mmol) in tetrahydrofuran (total volume: 100 ml) at room temperature. The resulting mixture was stirred for 1 hour and then cooled to 0° C. before 3,4,6-trichloropyridazine (5.7 g, 31.1 mmol) was added portionwise over 10 minutes. The reaction was then allowed to warm to room temperature and stirred for 16 hours before being poured into water and extracted with ethyl acetate (twice). The organic layer was washed with brine, dried (magnesium sulphate) and evaporated. The residue was purified by silica chromatography (eluting with 5-20% ethyl acetate in petrol containing 5% tetrahydrofuran) to yield 3,4-bis(benzyloxy)-6-chloropyridazine (4.0 g, 12.24 mmol, 39.4% yield) as the major product.

1. additionwas added portionwise over 10 minutes
2. stirringstirred for 16 hours
3. extractionextracted with ethyl acetate (twice)
4. washThe organic layer was washed with brine
5. dry with materialdried (magnesium sulphate)
6. customevaporated
7. customThe residue was purified by silica chromatography (eluting with 5-20% ethyl acetate in petrol containing 5% tetrahydrofuran)