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• W2179642533 abstract "The standard method for preparing carboxylic acid hydrazides is hydrazinolysis of esters in alcoholic solutions. However, when applied to alpha,beta-unsaturated esters, the main product typically is the pyrazolidinone resulting from an undesired Michael-type cyclization. Other alternative methodologies reported for direct preparation of hydrazides from acids are inefficient. We developed an efficient and general process, involving preforming activated esters and/or amides followed by reaction with hydrazine, for the preparation of hydrazides including those of alpha,beta-unsaturated acids. This process gives the desired hydrazides in excellent yield and purity under mild conditions." @default.
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• W2179642533 date "2002-12-01" @default.
• W2179642533 modified "2023-10-12" @default.
• W2179642533 title "A New Procedure for Preparation of Carboxylic Acid Hydrazides" @default.
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• W2179642533 doi "https://doi.org/10.1021/jo026288n" @default.
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