反应详情

A mixture of toluene-4-sulfonic acid 5-nitro-3,4-dihydro-2H-benzo[1,4]oxazin-3-ylmethyl ester (3.64 g, 10.0 mmole), p-toluenesulfonic acid monohydrate (3.8 g, 20.0 mmole) and 0.50 g of 10% palladium on carbon in 140 mL of methanol was treated with 50 psi of hydrogen on a Parr shaker for 1 hour. The catalyst was filtered and washed with additional methanol. The solvent was evaporated in vacuum to yield 6.7 g of the p-toluenesulfonate salt of the title compound as a pink solid. This compound was used for the next step without further purification.

1. filtrationThe catalyst was filtered
2. washwashed with additional methanol
3. customThe solvent was evaporated in vacuum