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ChemicalBook CAS DataBase List 1H-INDAZOLE-3-CARBOXYLIC ACID ETHYL ESTER
4498-68-4

1H-INDAZOLE-3-CARBOXYLIC ACID ETHYL ESTER synthesis

12synthesis methods
-

Yield:-

Reaction Conditions:

palladium

Steps:

5 Indazole-3-Carboxylic Acid
Preparation 5 Indazole-3-Carboxylic Acid A mixture of 4,5,6,7-tetrahydroindazole-3-carboxylic acid ethyl ester (21.0 g, 108 mmol), 5% palladium on carbon (7.0 g solid, 3.29 mmol of Pd), and 210 mL of cymene was heated to reflux for 38 hours. At this point complete conversion to the indazole-3-carboxylic acid ethyl ester was shown by TLC (silica gel, 3:1 ethyl acetate-heptane). The reaction was cooled to 120° C. and the 5% palladium on carbon was removed by filtration.

References:

Eli Lilly and Company US6069152, 2000, A

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