Process for the palladium catalyzed coupling of a diazonium salt with an olefinic bond
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United States of America Patent
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Dec 28, 1993
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app pub date -
Jan 22, 1992
filing date -
Jan 22, 1992
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Abstract
A 'one-pot' process for the palladium catalyzed coupling of a diazonium salt with an olefinic bond, in the aqueous medium in which the diazonium salt is made, by employing a carboxylic acid as a solvent. Arylacrylic acids and their esters, e.g. the cinnamates, can be produced at low catalyst concentration without first isolating the diazonium salt. The process is applied to the synthesis of 2-ethylhexyl p-methoxycinnamate.
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