SYNTHESIS FOR 3-BROMO-5-(2-ETHYLIMIDAZO[1, 2-ALPHA]PYRIDINE- 3-CARBONYL)-2-HYDROXYBENZONITRILE
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United States of America Patent
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Feb 10, 2022
app pub date -
Jan 17, 2020
filing date -
Jan 17, 2020
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Abstract
A method for synthesizing 3-bromo-5-(2-ethylimidazo[1,2-a] pyridine-3-carbonyl)-2-hydroxybenzonitrile, particularly relates to a method for synthesizing a compound represented by a formula (III), and particularly relates to step A or step B; step A: a compound represented by a formula (I) and a compound represented by a formula (II) are first heated in an organic solvent to react, and the resulting reaction product and a base are heated in the presence of water to continue the reaction to obtain a compound represented by a formula (III); and step B: a compound represented by the formula (I), a compound represented by a formula (II), and a base are heated in an organic solvent to react, and the resulting reaction product is heated in the presence of water to continue the reaction to obtain a compound represented by a formula (III).
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