231301-01-2Relevant academic research and scientific papers
A PROCESS FOR THE PREPARATION OF AN ALDEHYDE BETA-LACTAM COMPOUND
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Page/Page column 32, (2010/09/17)
The invention relates to a process for the preparation of an aldehyde beta-lactam compound of formula (I), wherein P1 is H or a protecting group, useful in the preparation of ezetimibe, from a nitrone compound of formula (II). The nitrone compound Il is prepared by reacting 4-fluorophenylhydroxyloamine with OH- protected 4-hydroxybenzaldehyde. The nitrone compound of formula (II) is reacted with an acetylene compound of formula (III) to form a compound of formula (IV), and the compound of formula (IV), after optional deprotection, is oxidized to obtain an aldehyde of formula (V), which undergoes isomerisation to the compound of formula (I). The subject of the invention are also novel compounds of formulas (II) and (IV).
