1: hydrazine / ethanol / 4 h / |Reflux
2: 4-(N,N-dimethlyamino)pyridine; N-ethyl-N,N-diisopropylamine / tetrahydrofuran / 24 h
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参考文献
BRISTOL-MYERS SQUIBB COMPANY; ORWAT, Michael J.; PINTO, Donald J.P.; SMITH II, Leon M.; SRIVASTAVA, Shefali; CORTE, James R.
Patent: WO2013/55984 A1, 2013 ;