“…Methyl AZELAALDEHYDATE is a versatile chemical intermediate readily available from the ozonization of methyl oleate (7,10), yet relatively few acetal derivatives have been prepared. Only methyl (5), ethyl (4) (of the ethyl ester), and pentaerythritol (11) acetals have been reported. Pentaerythritol acetals Of homologous -formylalkanoic acids or their esters-glyoxylic (1), malonaldehydic (1, 2),'succinaldehydic (1), 4,4-dimethyl-and 4,4-diethylglutaraldehydic (J) acids-also have been reported.…”