Table 2 Structures of synthesized derivatives of pyranopyrazolopyridone.

4a, 94%,

TON: 116

TOF: 11.6 h⁻¹

4b, 84%

TON: 103.7

TOF: 10.37 h⁻¹

4c, 87%

TON: 107.4

TOF: 10.74 h⁻¹

4d, 90%

TON: 111

TOF: 11.1 h⁻¹

4e, 87%

TON: 107.4, TOF: 10.74 h⁻¹

4f, 85%

TON: 104.9

TOF: 10.49 h⁻¹

4 g, 73%

TON: 90.1

TOF: 9.01 h⁻¹

4 h, 78%

TON: 96.3 TOF: 9.63 h⁻¹