| 摘要 |
New glyoxal derivs. have formula (RO)2CHCH(OY)OR (I) R = (substd.) 1-4C alkyl or (substd.) 3-5C alkenyl; Y = H or 2-4C acyl. 1-Acetoxy-1,2,2 -triethoxy-ethane; 1-acetoxy-1,2,2-triallyloxy-ethane; 1-hydroxy-1,2,2 -triallyloxy-ethane and 1-hydroxy-1,2,2 -triethoxy-ethane are specificallyclaimed. To prepare (I) a glyoxal acetal of formula (RO)2CHCH(OR)2 is reacted with a stoichiometric amt. of a carboxylic acid anhydride of formula (R1)2O, to give I (Y = acyl), which can be saponified to I (Y = H).
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