Ethyl 1H-indazole-5-carboxylate

10286] The resulting ethyl 1 -acetyl-1 H-indazole-5-car- boxylate was stirred in a mixture of concentrated hydrochloric acid (15 ml), water (15 ml) and ethanol (30 ml) forhours at a room temperature. The resulting mixture was rendered faintly alkaline with a 25percent ammonia water. The faintly alkalified mixture was subjected to extraction with chloroform. The extract was crystallized from n-hexane, and then the resulting crystal was separated by filtration and driedgive the title compound (6.45 g, 48percent) as a light-brown powder.1H-indazole-5-carboxylic acid 23 (2.0mmol) was placed in a 35 mL microwave vessel and dissolved in ethanol (10 mL) under nitrogen atmosphere. The vessel was placed in an ice bath to reach 0°C and thionyl chloride (10.0 mmol) was added slowly while stirring. After 5 minutes the vessel was placed in a microwave reactor and the reaction carried out with the following method in dynamic mode: 130°C, 60 min, 80W. After completion the reaction mixture was transferred to a round bottom flask, methanol was added to destroy remaining thionyl chloride and the solvente vaporated under reduced pressure. The crude product was dissolved in ethyl acetate and washed 3 times with 20percent KStep 4-1-2

Molecular Weight:190.20
XLogP3:2.4
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:3
Rotatable Bond Count:3
Exact Mass:190.074227566
Monoisotopic Mass:190.074227566
Topological Polar Surface Area:55
Heavy Atom Count:14
Complexity:220
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes