Реакция #57025

Уравнение реакции

KOH

6-(1H-imidazol-4-ylmethyl)-7,8-dihydro-6H-quinolin-5-one

hydrazine

→

6-(1H-imidazol-4-ylmethyl)-5,6,7,8-tetrahydro-quinoline

Растворители

water

NaHCO3

diethylene glycol

Условия реакции

Обработка

1. 1
   ЭкстракцияThe aqueous solution was extracted with CHCl3 (3×50 mL)
2. 2
   ПромывкаThe combined organic portions were washed with water and brine
3. 3
   СушкаThe organic layer was dried over MgSO4
4. 4
   Фильтрацияfiltered
5. 5
   Другоеevaporated

Методика

Use of 7,8-dihydro-6H-quinolin-5-one (Intermediate TWENTYTWO-1) (obtained as described in Molina, et. al. Tetrahedron 1995, 51, 1265, incorporated herein by reference) in Method E produced 6-(1H-imidazol-4-ylmethyl)-7,8-dihydro-6H-quinolin-5-one (Intermediate TWENTYTWO-2). To a solution of 6-(1H-imidazol-4-ylmethyl)-7,8-dihydro-6H-quinolin-5-one (Intermediate TWENTYTWO-2) (1.31 g, 227 mmol) in diethylene glycol (10 mL) was added hydrazine (6.3 mL, 200 mmol) followed by KOH (4.85 g, 56.2 mmol). The mixture was heated to 170° C. for 5 h. The mixture was diluted with water (200 mL) and sat. NaHCO3. The aqueous solution was extracted with CHCl3 (3×50 mL). The combined organic portions were washed with water and brine. The organic layer was dried over MgSO4, filtered and evaporated to give 6-(1H-imidazol-4-ylmethyl)-5,6,7,8-tetrahydro-quinoline as a foamy solid, 1.15 g (92%). By the applicable process steps described in Method A, the imidazole compound was used to produce 4-(5,6,7,8-tetrahydro-quinolin-6-ylmethyl)-1,3-dihydro-imidazole-2-thione (Compound 162).

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