Methyl iodide → 2-Chloro-9-cyclopentyl-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one

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Reaction Conditions

Reaction Steps

2-Chloro-9-cyclopentyl-5,7,8,9-tetrahydro-6H-pyrimido [4,5-b][1,4] diazepin-6-one (318 mg, 0.0012 mol) and MeI (88 μl, 0.0014 mol, 1.18 eq) were added to DMF (5 ml) and the solution cooled to −10° C. using acetone/dry ice before the addition of NaH (30 mg, 0.0013 mol, 1.07 eq). The RM was then stirred at 0° C. for 30 min and rt for 30 min. The RM was concentrated and the product extracted using EtOAc/H2O. The organic extracts were combined, washed with sat NaCl, dried using MgSO4, filtered and the filtrate evaporated under reduced pressure and further dried in vacuo to give the product as a purple oily residue (252 mg, 75%); Rt=13 min (Vydac 1); MS+ve: 281.2.

Provenance & Evidence