作者:Tim Traulsen、Willy Friedrichsen
DOI:10.1039/b000619j
日期:——
with coumarin (1) furo[3,4-b]benzofuran 4 was synthesized using the Hamaguchi–Ibata methodology. Intermolecular Diels–Alder reactions provide compounds 5–8. In a [4 + 3] cycloaddition reaction with oxyallyl compound 9 was obtained. The C-annulated furans 16a (in situ) and 16b have been prepared by a similar methodology starting with 10a,b. In an intramolecular Diels–Alder reaction compounds 17a,b were
从...开始 香豆素(1)使用Hamaguchi–Ibata方法合成了呋喃[3,4- b ]苯并呋喃4。分子间Diels–Alder反应提供5–8化合物。在[4 + 3]中,与氧基烯丙基化合物9的环加成反应得到。该Ç -annulated呋喃 16a(原位)和16b已通过类似的方法从10a,b开始制备。在分子内Diels–Alder反应中,获得化合物17a,b。报道了使用半经验方法(AM1,PM3)和密度泛函理论方法(B3LYP / 6-31G *)对呋喃[3,4- b ]苯并呋喃在分子间和分子内Diels-Alder反应中反应性的计算研究。