Diels-Alder reaction of 4,6-dihydrothieno(3,4-c)furan-5,5-dioxide with quinones: Stereoselective synthesis of quinone-annelated 2,3-bis(methylene)-7-oxabicyclo(2.2.1)heptanes.
作者:Takayoshi SUZUKI、Kan KUBOMURA、Hiroaki TAKAYAMA
DOI:10.1248/cpb.39.2164
日期:——
4, 6-Dihydrothieno[3, 4-c]furan-5, 5-dioxide (1), a novel precursor of a bis-diene, reacts with quinones to afford the normal Diels-Alder adducts, the quinone-annelated 2, 3-bis (methlene)-7-oxabicyclo[2.2.1]-heptane derivatives. Promising building blocks(3b and 5) for the synthesis of the antineoplastic antibiotics are prepared by this method.
4, 6-二氢噻烷[3, 4-c]呋喃-5, 5-二氧化物(1)作为一种新型双烯前体,与喹啉反应生成正常的 Diels-Alder 加合物,即喹啉-环化的 2, 3-双(亚甲基)-7-氧双环[2.2.1]-庚烷衍生物。通过这种方法制备的有前景的构建块(3b 和 5)可用于抗肿瘤抗生素的合成。