環状酸無水物の水素化硼素ナトリウムによる還元反応

抄録

Cyclic carboxylic anhydrides were reduced to the corresponding lactones with NaBH₄. In the case of maleic anhydride (I) and 1, 8-naphthalenedicarboxylic anhydride (XIX), the reduction proceeded further and, both 2-buten-4-olide (II) and γ-butyrolactone (III) were obtained as the product. Reduction of XIX gave the lactone (XX), hemiacetal (XXI), ether (XXII), and dialcohol (XXIII). XXII was presumably derived from XXI by subsequent dehydration reaction.