O=[C:2]1[C:7]2[N:8]=[CH:9][S:10][C:6]=2[CH2:5][CH2:4][CH2:3]1.[CH3:11][NH2:12]>C(O)C>[CH3:11][N:12]=[C:2]1[C:7]2[N:8]=[CH:9][S:10][C:6]=2[CH2:5][CH2:4][CH2:3]16 g (0.039 mole) of the ketone obtained in step (d) are dissolved in 50 ml anhydrous ethanol and treated for 30 minutes with a gaseous methylamine stream. After evaporation to dryness, the residue is taken up into ether and filtered, to give 5.6 g (86%) of product, M.p. 233°-235° C.
Wird geladen…