Large scale preparation of 2,4-dihydroxybenzaldehyde using a var

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

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568436, 568437, C07C24900, C07C 4500, C07C 4590

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active

055999883

ABSTRACT:
A novel process for producing chiral hydroxylamines for use as intermediates to make chiral hydroxyureas, which process comprises a tandem condensation-cyclization reaction between a dimethylsulfoxoniurn methylide and an appropriately substituted nitrone bearing a D- or L- mannose chiral auxiliary to yield a compound of Formula (I) as claimed herein.

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