反应详情

In 5 mL of THF, 200 mg (0.43 mmol) of N-(3-acetoxy-17-cyclopropylmethyl-4,5α-epoxy-14-hydroxy-morphinan-6β-yl)-maleimide obtained in Example 21-1 was dissolved, and 85 mg (0.62 mmol) of nitromethylbenzene and 66 mg (0.43 mmol) of DBU were added, followed by stirring the mixture at room temperature for 1 hour. To the reaction mixture, aqueous saturated sodium hydrogen carbonate solution was added, and the resulting mixture was extracted with chloroform. Organic layers were combined, washed with saturated saline, dried over anhydrous magnesium sulfate and concentrated to obtain a crude product. The obtained crude product was purified by silica gel column chromatography to obtain 196 mg (yield: 82%) of the captioned compound.

1. extractionthe resulting mixture was extracted with chloroform
2. washwashed with saturated saline
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated
5. customto obtain a crude product
6. customThe obtained crude product
7. customwas purified by silica gel column chromatography