作者:Werner Löwe、Stefanie A. Brätter、Manuela Weber、Peter Luger、Joachim Buddrus
DOI:10.1002/jhet.5570380208
日期:2001.3
propose that this ring transformation proceeds via the cyclopropyl intermediate d (Scheme 2), which undergoes a ring opening reaction comparable to the Favorskii rearrangement. Also, 8 reacts with methanol/sodium methoxide to yield the 3(2H)-furanone derivative 11, the formation of which is suggested to proceed via the intermediate k with a carbenium-oxonium-ion subunit (Scheme 3). The structure of
在碱性条件下,2,6-双(溴甲基)-4-吡喃酮8与四甘醇反应生成意想不到的大环9,这与抗生素Kjellmanianone 10有关。我们建议这种环转化是通过环丙基中间体d(方案2)进行的,后者经历了与Favorskii重排相当的开环反应。同样,8与甲醇/甲醇钠反应生成3(2 H)-呋喃酮衍生物11,建议通过中间体k进行形成。带有碳氧鎓氧离子亚基(方案3)。通过X射线分析确认了3(2 H)-呋喃酮衍生物的结构。