反应 #1483049

反应方程式

sodium nitrite

4-(hydroxymethyl)-benzenecarboximidic acid, ethyl ester, hydrochloride

formamidine acetate

hydrazine

→

(4-(1,2,4,5-tetrazin-3-yl)phenyl)methanol

收率 21.3%

溶剂

acetic acid

water

反应条件

后处理

1. 1
   workup.STIRRINGto stir for 15 minutes
2. 2
   其他The aqueous crude reaction
3. 3
   萃取was subsequently extracted with methylene chloride (4×10 mL)
4. 4
   干燥The organic extracts were dried with MgSO4
5. 5
   其他After solvent removal
6. 6
   其他the crude pink product was purified by flash chromatography (silica gel)
7. 7
   洗涤first washing with 100% methylene chloride

实验过程

To a mixture of 4-(hydroxymethyl)-benzenecarboximidic acid, ethyl ester, hydrochloride (1 mmol, 216 mg) and formamidine acetate (5 mmol, 521 mg) was added anhydrous hydrazine (20 mmol, 630 uL) the resulting viscous oil was allowed to stir. After 1 hour, acetic acid (3 mL) was added followed by sodium nitrite (690 mg, 10 mmol) as a finely divided powder. The now bright pink solution was allowed to stir for 15 minutes and then diluted with 15 mL of water. The aqueous crude reaction was subsequently extracted with methylene chloride (4×10 mL). The organic extracts were dried with MgSO4. After solvent removal, the crude pink product was purified by flash chromatography (silica gel) first washing with 100% methylene chloride, followed by methylene chloride with 1% methanol, giving (4-(1,2,4,5-tetrazin-3-yl)phenyl)methanol (40 mg, 21%) as a bright pink solid. LRMS-ESI [M+H]− calcd. for C9H9N4O−: 189.08, found: 188.8.

来源