反应详情

5,6-Dimethoxy-2-methylbenzotellurazole (Example 19) (4.8 g=0.013 mole) was dissolved in dichloromethane (75 ml), and methyl trifluoromethanesulfonate (2.48 g=1.66 ml=0.013 mole) was added. The solution turned cloudy and crystals started to deposit within a few minutes. Precipitation was completed by addition of diethyl ether. The product was collected by filtration to give 5.5 g, 86.5% of theory, m.p. 210°-234° C. The product was recrystallized from boiling acetone (≃130 ml required) m.p. 242°-243° C.

1. waitto deposit within a few minutes
2. customPrecipitation
3. additionwas completed by addition of diethyl ether
4. filtrationThe product was collected by filtration
5. customto give 5.5 g, 86.5% of theory, m.p. 210°-234° C
6. customThe product was recrystallized