1H-Pyrrolo[2,3-b]pyridine, 2,3-dihydro-1,3,3-trimethyl-2-methylene- → HCID 15100094, compound

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Reaction Steps

Into a three-necked 100 milliliter round bottom flask was charged a solution of 0.8 grams of the thus prepared 1,3,3-trimethyl-2-methylene-1,7-diazaindane in 20 milliliters of absolute ethanol. The solution was heated under a nitrogen pad to 60°-65° C. and 0.84 grams of 2-nitroso-3,5-dimethoxyphenol added to the flask. The reaction mixture was maintained at temperature and refluxing for a total reaction time of about 26 hours. The ethanol was removed on a rotary evaporator and the resulting reaction mixture taken up in ether and filtered. The ether solution sequentially was washed with 100 milliliters of a 10 percent sodium hydroxide solution, and 100 milliliters of a saturated sodium chloride solution and then dried over potassium carbonate. The ether was removed under vacuum. A silica gel column was used to isolate the final product, i.e., 1',3'-Dihydro-1',3',3'-trimethyl-5,7-dimethoxyspiro-[2H-1,4-benzoxazine-2,2'-[2H] pyrrolo[2,3-b]pyridine]. Identification of the product was confirmed by appropriate spectral analysis.

Provenance & Evidence