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. 2022 May 24;27(11):3380. doi: 10.3390/molecules27113380

Table 1.

1-Amino-N-alkyl(aryl)-5-pyrazol-1-yl-pyrano[4,3-d]thieno[2,3-b]pyridines 3.

Compound R Yield (%) 1
3a COOEt Method (A) 81/Method (B) 78
3b CN 89
3c CONHC6H5 98
3d CONH-2,4-(OMe)2C6H3 92
3e CONH-3,4-Cl2C6H3 90
3f CONH(CH2)2C6H5 89

1 Yield after recrystallization.