Multi-step reaction with 6 steps
1.1: N-ethyl-N,N-diisopropylamine / tetrahydrofuran / 96 h / 20 °C
2.1: 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine / tetrahydrofuran / 3 h / 20 °C
3.1: borane-THF / tetrahydrofuran / 0 - 50 °C / Inert atmosphere
3.2: 20 °C / Inert atmosphere
3.3: pH 14
4.1: trifluoroacetic acid / dichloromethane / 20 - 40 °C
5.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 2.08 h / 20 °C / Cooling
6.1: isopropyl alcohol / 1 h / 170 °C / Microwave irradiation
With
borane-THF; 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine; sodium hydride; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid;
In
tetrahydrofuran; dichloromethane; N,N-dimethyl-formamide; isopropyl alcohol; mineral oil;