描述了通过分子内2-羧基和2-甲酰基双(5-烷基呋喃-2-基)甲烷的分子环化反应合成许多在位置9处含有呋喃基取代基的萘并[2,3- b ]呋喃衍生物的方法。已经研究了标题化合物在甲酰化,乙酰化,硝化和氧化反应中的反应性。结果表明,硝化2-甲基-9-(5-甲基-2-呋喃基)萘并[2,3 - b ]呋喃-4-基乙酸盐会导致呋喃氧化开环而不是亲电取代。
Acid-catalyzed cascade rearrangement of 4-acetoxy-9-furylnaphtho[2,3-b]furans
作者:Alexander V. Fin’ko、Valery O. Babikov、Arkady S. Pilipenko、Vladimir T. Abaev、Igor V. Trushkov、Alexander V. Butin
DOI:10.1007/s00706-013-1075-7
日期:2013.11
AbstractAcid-catalyzed recyclization of 4-acetoxy-9-furylnaphtho[2,3-b]furans efficiently produced naphtho[1,2-b:3,4-b’]difurans. On the other hand, 4-aminonaphtho[2,3-b]furans failed to undergo the analogous recyclization into benzo[g]furo[2,3-e]indoles. The difference in behavior of these two types of substrates was explained by employing density functional theory calculations. Graphical abstract
摘要4-乙酰氧基-9-呋喃基萘并[ 2,3- b ]呋喃的酸催化再循环有效地产生了萘并[1,2- b: 3,4- b' ]二呋喃。另一方面,4-氨基萘[2,3- b ]呋喃没有经历类似的环化成苯并[ g ]呋喃[2,3- e ]吲哚。通过使用密度泛函理论计算来解释这两种类型的基材在行为上的差异。 图形概要
Furan ring opening–furan ring closure: cascade rearrangement of novel 4-acetoxy-9-furylnaphtho[2,3-b]furans
作者:Vladimir V. Mel’chin、Alexander V. Butin
DOI:10.1016/j.tetlet.2006.04.081
日期:2006.6
The cascade rearrangement of novel 4-acetoxy-9-furylnaphtho[2,3-b]furans leading to tetracyclic naphthodifurans derivatives has been developed. The reaction proceeds via double recyclization of both furanrings of the initial molecule, one of the furanrings serving as a 1,3-dicarbonyl compound equivalent.
已开发出导致四环萘二呋喃衍生物的新型4-乙酰氧基-9-呋喃基萘并[2,3- b ]呋喃的级联重排。该反应通过初始分子的两个呋喃环的两次再循环而进行,其中一个呋喃环用作1,3-二羰基化合物当量。