Synthesis and structural analysis of hydronopyl formic acid and its esters

Hydronopyl magnesium chloride was prepared through the Grignard reaction of hydronopyl chloride and magnesium in solvent of ether. Hydronopylformic acid was obtained from the hydrolyze reaction of diluted hydrochloric acid with the injection of CO2. Then six kinds of hydronopylformic acid esters were synthesized from the reaction of hydronopyl formic acid with methanol, ethanol, propanol, butanol, pentanol and hexanol with oxalic acid as catalyst respectively. The yields of the products (GC contents were over 98%) were more than 85%. The structures of the products were characterized and analyzed by IR, 1H NMR, 13C NMR and MS methods.