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Azetidine hydrazones synthesis

The reactions of AyV-dialkylhydrazoncs with benzoyloxyketene <2002AGE831> and aminoketene <2004OL2749> precursors appear to be a new general approach to the enantioselective synthesis of 4-substituted 3-alkoxyazetidin-2-ones and 3-aminoazetidin-2-ones. Such hydrazones 488, derived from formaldehyde, afforded 4-unsubstituted azetidin-2-ones 489 (Equation 198) in 80-96% yields and dr s up to 99 1 <2004CEJ6111>. [Pg.75]

The asymmetric synthesis of 2-mono- and 2,3-/rtjw5-disubstituted azetidines 3 has been described <04EJO4471>. Key steps are a diastereoselective a-alkylation of aldehyde SAMP-hydrazones with benzyloxymethyl chloride as the electrophile, and a nucleophilic 1,2-... [Pg.64]

See other pages where Azetidine hydrazones synthesis is mentioned: [Pg.107]    [Pg.65]    [Pg.228]   
See also in sourсe #XX -- [ Pg.110 ]

See also in sourсe #XX -- [ Pg.5 , Pg.110 ]

See also in sourсe #XX -- [ Pg.110 ]

See also in sourсe #XX -- [ Pg.5 , Pg.110 ]



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Azetidine

Azetidine hydrazones

Azetidines, synthesis

Hydrazone synthesis

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