Réaction #2052311

Équation de réaction

ammonia

Ammonia

MeOH

6-Bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-4′-methylspiro[chroman-4,2′-imidazole]-5′(1′H)-thione

→

title compound

Rendement 30.0%

6-Bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-5′-methylspiro[chroman-4,2′-imidazol]-4′-amine

Rendement 30.0%

Solvants

DMF

Conditions de réaction

Traitement

1. 1
   AutreThe vial was sealed
2. 2
   ConcentrationThe mixture was concentrated
3. 3
   Températureheated at 120° C. for 30 min in a microwave reactor
4. 4
   AutreAfter evaporation of the solvent

Mode opératoire

6-Bromo-2-(2,2-dimethyltetrahydro-2H-pyran-4-yl)-4′-methylspiro[chroman-4,2′-imidazole]-5′(1′H)-thione (Example 49 Step 2), directly from the previous step was dissolved in dry DMF (4 mL) in a microwave vial. Ammonia, 7M in MeOH (18 mL, 126 mmol) was added. The vial was sealed and the reaction was heated at 100° C. for 60 min in a microwave reactor (fixed hold time). The mixture was concentrated and the residue was dissolved in ammonia (7M in MeOH, 18 mL, 126 mmol) and heated at 120° C. for 30 min in a microwave reactor. This cycle was repeated three more times. After evaporation of the solvent, the remaining product was subjected to flash chromatography (0-7% of MeOH(NH3) in DCM) to give the title compound as a mixture of isomers (1.29 g, 30% yield over two steps): MS (ES+) m/z 406 [M+H]+.

Source