Synthesis and ethylene-promoted metathesis of adducts of tandem [4+2]/[4+2] cycloaddition between bis-furyl dienes and maleic acid derivatives
作者:Elizaveta A. Kvyatkovskaya、Polina P. Epifanova、Eugeniya V. Nikitina、Aleksey A. Senin、Victor N. Khrustalev、Kirill B. Polyanskii、Fedor I. Zubkov
DOI:10.1039/d0nj04528d
日期:——
During this work, a series of 1,4:5,8-diepoxynaphthalenes, annellated with various carbo- and heterocycles, was synthesized based on the tandem intermolecular/intramolecular [4+2] cycloaddition of bis-furyl dienes with moderately to highly reactive cyclic dienophiles (maleic anhydride and maleinimides). The stereochemistry of the resulting adducts was established using 2D NMR and X-ray structural analysis
Classical Example of Total Kinetic and Thermodynamic Control: The Diels–Alder Reaction between DMAD and Bis-furyl Dienes
作者:Kseniya K. Borisova、Elizaveta A. Kvyatkovskaya、Eugeniya V. Nikitina、Rinat R. Aysin、Roman A. Novikov、Fedor I. Zubkov
DOI:10.1021/acs.joc.8b00336
日期:2018.4.20
tandem Diels–Alderreaction of activated alkynes and bis-dienes has been revealed. The reaction between bis-furyl dienes and DMAD occurs at 25–80 °C and leads to kinetically controlled “pincer” adducts, 4a,8a-disubstituted 1,4:5,8-diepoxynaphthalenes. On the contrary, only thermodynamically controlled “domino” adducts (2,3-disubstituted 1,4:5,8-diepoxynaphthalenes) are formed in the same reaction at 140
揭示了在活化的炔烃和双二烯串联Diels-Alder反应中发生化学特异性的罕见例子。双呋喃二烯与DMAD之间的反应在25–80°C下发生,并导致动力学控制的“钳子”加合物4a,8a-二取代的1,4:5,8-双环氧萘。相反,在140°C的同一反应中仅形成热力学控制的“多米诺”加合物(2,3-二取代的1,4:5,8-双环氧萘)。加热时,“钳子”加合物可转变成“多米诺”加合物。使用动态1 H NMR光谱计算两种类型反应的速率常数。
Dehydrobenzene in the Reaction of a Tandem [4+2]/[4+2] Cycloaddition with Linear bis-furyldienes
作者:Elizaveta A. Kvyatkovskaya、Polina P. Epifanova、Kseniya K. Borisova、Sophia I. Borovkova、Mikhail S. Grigoriev、Fedor I. Zubkov
DOI:10.1007/s10593-021-03005-2
日期:2021.9
Tandem [4+2]/[4+2] cycloaddition between bis-dienes containing two furan rings and dehydrobenzene as a dienophile was studied. It was shown that dehydrobenzene generated in situ from 2-(trimethylsilyl)phenyl trifluoromethanesulfonate is capable of a facile intermolecular [4+2] cycloaddition to a furan moiety of a diene at room temperature. The next step, that involves intramolecular Diels–Alder reaction