Process for producing phosphorus-containing dehydroamino acid
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United States of America Patent
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Dec 11, 2012
Grant Date -
Jan 13, 2011
app pub date -
Mar 19, 2008
filing date -
Mar 19, 2007
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Abstract
A process for efficiently producing through a small number of steps an N-substituted 2-amino-4-(substituted-oxymethylphosphinyl)-2-butenoic ester which is an intermediate for herbicide L-AMPB. The process comprises reacting a compound represented by the following formula (1): (where R1 represents C1-4 alkyl group) with a compound represented by the following formula (2): (wherein R2, R2′, and R3 each represents C1-4 alkyl and R4 represents benzyloxycarbonyl) in the presence of a base.
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