Reacción #1119120

Ecuación de reacción

ethyl acetate

4-amino-1,1,3-trimethylindane

4-methyl-1,2,3-thiadiazole-5-carboxylic acid

thionyl chloride

→

white crystals

Rendimiento 74.2%

4-methyl-N-(1,1,3-trimethylindan-4-yl)-1,2,3-thiadiazole-5-carboxamide

Rendimiento 74.2%

Disolventes

triethylamine

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturawas refluxed for 1 hour
2. 2
   workup.DISTILLATIONThe resultant solution was distilled under reduced pressure
3. 3
   Otroto remove excess thionyl chloride
4. 4
   workup.DISSOLUTIONThe obtained residue was dissolved in 10 ml of ethyl acetate
5. 5
   OtroThe resultant reaction solution
6. 6
   Lavadowas sequentially washed with water, aqueous sodium hydrogen carbonate solution, water
7. 7
   Concentracióna saturated brine, and then concentrated under reduced pressure
8. 8
   OtroThe concentrated residue was separated
9. 9
   Otropurified by silica gel column chromatography (eluent: ethyl acetate/n-hexane =1/9)

Procedimiento

A mixture of 1.5 g (10.4 mmols) of 4-methyl-1,2,3-thiadiazole-5-carboxylic acid, 5 ml of thionyl chloride, and one drop of pyridine was refluxed for 1 hour. The resultant solution was distilled under reduced pressure to remove excess thionyl chloride. The obtained residue was dissolved in 10 ml of ethyl acetate. This solution was added to 10 ml of ethyl acetate solution of 1.7 g (9.7 mmols) of 4-amino-1,1,3-trimethylindane and 4 ml of triethylamine, and the resultant solution was stirred at room temperature for 3 hours. The resultant reaction solution was sequentially washed with water, aqueous sodium hydrogen carbonate solution, water, and a saturated brine, and then concentrated under reduced pressure. The concentrated residue was separated and purified by silica gel column chromatography (eluent: ethyl acetate/n-hexane =1/9), to obtain 2.17 g of white crystals (Compound No. 14 shown in Table 6). The yield was 69.1%.

Fuente