Calcium-Catalyzed Synthesis of Fused Furo[2,3-<i>b</i>]furans and Substituted Furans from 2-Oxo Aldehydes and Cyclic Enols
作者:Srinivasarao Yaragorla、Sanyasi Rao Ithu、Doma Arun、Valmuri Srivardhan
DOI:10.1021/acs.joc.3c01508
日期:2023.12.15
an atom-economical, syn-diastereoselective synthesis of naphtho-fused furo[2,3-b]furans along with naphthofurans at room temperature using readily available 2-naphthols and 2-oxo aldehydes using an alkaline earth catalyst [Ca(OTf)2]. 2-Oxo aldehydes having both aryl and alkyl substitutions reacted well. A good number of arenols responded to give fused furans, but selected arenols gave only furofurans
我们在这里报道了一种原子经济的顺式非对映选择性合成萘并稠合呋喃[2,3- b ]呋喃以及萘并呋喃在室温下使用容易获得的2-萘酚和2-氧代醛使用碱土金属催化剂[Ca( OTf) 2 ]。具有芳基和烷基取代的2-氧代醛反应良好。许多芳醇响应产生稠合呋喃,但选定的芳醇仅产生呋喃呋喃。合成应用和克级合成也被证明可以加强这一策略。