| 摘要 |
1,4:3,6-Dianhydro hexitol derivs. of formula (I), in which R 1 is H, 2-5C acyl, pyridyl-carbonyl or nitro, and R2 is a 1,4-dihydro pyridyl-carbonyl gp. of formula (II), are made by reaction of a arylidene beta-keto carboxylate ester of formula (III) with a beta-keto carboxylate ester of 1,4:3,6-dianhydro hexitol of formula (IV). (Substituents R3,R4,R5 and X not defined).
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