反应详情

A mixture of 1-naphthalenemethanamine (1.34 g, 8.51 mmol) and 6,6-dimethyl-2-hepten-4-ynal (1.16 g, 8.51 mmol) in 20 ml of dry ethyl ether was stirred over 4A sieves overnight. Sieve material was then removed by centrifugation, washed once with ethyl ether and the combined ether fractions concentrated to afford the crude condensed product. About 8.08 mmol of this material was stirred with sodium borohydride (343 mg, 9.06 mmol) in 20 ml of methanol at room temperature for 3.75 hours. The reaction mixture was partitioned between aqueous sodium bicarbonate and methylene chloride, the aqueous layer extracted twice with methylene chloride, and the combined organic solution washed with water and dried over magnesium sulfate. Removal of the solvent afforded N-(6,6-dimethyl-2-hepten-4-ynyl)-1-naphthalenemethanamine as a mixture of the E and Z isomers. Flash chromatography of this product on silica gel (5 cm column, eluting with 0.2% triethylamine in chloroform) afforded 0.74 g of the pure (E)-N-6,6-dimethyl-2-hepten-4-ynyl)-1-naphthalenemethanamine.

1. customSieve material was then removed by centrifugation
2. washwashed once with ethyl ether
3. concentrationthe combined ether fractions concentrated
4. customto afford the crude
5. customcondensed product
6. customThe reaction mixture was partitioned between aqueous sodium bicarbonate and methylene chloride
7. extractionthe aqueous layer extracted twice with methylene chloride
8. washthe combined organic solution washed with water
9. dry with materialdried over magnesium sulfate
10. customRemoval of the solvent