反应详情

This example illustrates a synthesis of 1-(4-(S)-Methyl-7,8-oxido-8-methylnonyl)-3,7-dimethylxanthine (inventive compound no. 2548S). To a suspension of magnesium (2.74 g, 140 mmol) and a crystal of iodine in tetrahydrofuran (15 mL) was added (S)-citronellyl bromide (5.0 g, 22.8 mmol) in tetrahydrofuran (10 mL) over 30 minutes and the reaction stirred for a further 30 minutes after the addition was complete. The solution was added via a canula over 5 minutes to a suspension of paraformaldehyde (1.80 g, 60.0 mmol) in tetrahydrofuran (15 mL) and stirred at 25° C. for 6 hours. Saturated ammonium chloride (40 mL) was added and extracted with diethyl ether (2×30 mL). The combined organic extracts were dried (magnesium sulfate) and evaporated to yield 3.25 g (84% yield) 4-(S)-methyl-8-methylnon-7-enyl alcohol as a clear liquid.

1. additionafter the addition
2. stirringstirred at 25° C. for 6 hours
3. extractionextracted with diethyl ether (2×30 mL)
4. dry with materialThe combined organic extracts were dried (magnesium sulfate)
5. customevaporated