Researches in the Quinazoline Group ..
Researches in the Quinazoline Group ..
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64 Digitized by VjOOQIC 50 6' A mino-s-methyl'4-quinazolone, (6) NHj,CJI,< I .—The 6-mtro-3-inethyl-4-quin- X:0 — N.CH, azolone was reduced by adding 3 grams to the calculated amount of stannous chloride dissolved in concentrated hy* drochloric acid. Although heat was developed, the mixture was warmed awhile longer to complete the reaction. During the heating white crystals were formed but were not isolated. These were dissolved^ in about three times the volume ^of warm water and hydrogen sulphide passed in until all the tin had been removed. The solution was then heated to remove the hydrogen sulphide and made alka- line, keeping the solution hot. A precipitate of ferrous hy- droxide was filtered off. On cooling, the amino derivative separated in small, white needles. Recrystallization from water yielded a product melting at 209° C. (uncor.). Yield, 20 per cent, of the theory. 0.1020 gram of substance gave 21.9 cc. of nitrogen at 764 mm. and 26° C. QjHgN^. Pound. Per cent. Percent.
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To quickly assess the difficulty of the text, read a short excerpt:
64 Digitized by VjOOQIC 50 6' A mino-s-methyl'4-quinazolone, (6) NHj,CJI,< I .—The 6-mtro-3-inethyl-4-quin- X:0 — N.CH, azolone was reduced by adding 3 grams to the calculated amount of stannous chloride dissolved in concentrated hy* drochloric acid. Although heat was developed, the mixture was warmed awhile longer to complete the reaction. During the heating white crystals were formed but were not isolated. These were dissolved^ in about three times the volume ^of warm water and hydrogen sulphide passed in until all the tin had been removed. The solution was then heated to remove the hydrogen sulphide and made alka- line, keeping the solution hot. A precipitate of ferrous hy- droxide was filtered off. On cooling, the amino derivative separated in small, white needles. Recrystallization from water yielded a product melting at 209° C. (uncor.). Yield, 20 per cent, of the theory. 0.1020 gram of substance gave 21.9 cc. of nitrogen at 764 mm. and 26° C. QjHgN^. Pound. Per cent. Percent.
What to read after Researches in the Quinazoline Group ..?
You can find similar books in the "Read Also" column, or choose other free books by Geiger, George Augustus, 1886- to read online
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