Synthesis of 3-Alkylcatechols via Intramolecular Cyclization
作者:Tetsuo Miyakoshi、Hiroyasu Togashi
DOI:10.1055/s-1990-26889
日期:——
The intramolecular cyclization of 2-alkanoyl-2,5-dimethoxytetrahydrofurans 4 with aqueous acid is described. 3-Alkylcatechols 7 were prepared in generally good yields by boiling the dioxane solution of compounds 4 in the presence of 1M hydrochloric acid. In addition, 4,5-dioxoalkanals 6 were obtained in good to high yields when the dioxane solution of compounds 4 was treated with 0.1 M hydrochloric acid.
Photochemical behaviour of 5-bromo-2-furyl ketones
作者:Roberto Antonioletti、Maurizio D'auria、Antonella De Mico、Giovanni Piancatelli、Arrigo Scettri
DOI:10.1016/s0040-4020(01)96697-9
日期:1985.1
The photochemical behaviour of the compound 8 was studied. The irradiation of a 10-3M solution of 8 in aromatic solvents gave high yields of 9 The irradiation of 8 in ethereal or amine solution quantitatively gave 10 The comparison of reaction rates and quantum yields in different solvents gave results in agreement with the hypothesis of an exciplex formation.
[EN] METHODS OF FORMING AROMATIC CONTAINING COMPOUNDS<br/>[FR] PROCÉDÉS PERMETTANT DE FORMER DES COMPOSÉS CONTENANT UN GROUPE AROMATIQUE
申请人:UNIV MINNESOTA
公开号:WO2017079718A1
公开(公告)日:2017-05-11
Methods that include acylating an aromatic containing compound by reacting the aromatic containing compound with an anhydride containing compound to form an acylated aromatic containing compound.
使用酰化方法,通过将含芳香基化合物与含酐基化合物反应,形成酰基化芳香基化合物。
1,5‐Allyl Shift by a Sequential Achmatowicz/Oxonia‐Cope/Retro‐Achmatowicz Rearrangement
furfuryl alcohol through two-step sequential ring expansion/contraction rearrangement at room temperature, which could be considered as a Woodward–Hoffmann-forbidden formal [3,5]-sigmatropic rearrangement. Mechanistically, it involves Achmatowiczrearrangement, oxonia-Cope rearrangement, and an unprecedented “retro-Achmatowicz” rearrangement.
Ru-Catalyzed Isomerization of Achmatowicz Derivatives: A Sustainable Route to Biorenewables and Bioactive Lactones
作者:Miroslav Dangalov、Adolfo Fernández-Figueiras、Martin A. Ravutsov、Ekaterina Vakarelska、Maya K. Marinova、Nuno R. Candeias、Svilen P. Simeonov
DOI:10.1021/acscatal.2c04867
日期:2023.2.3
A Ru-catalyzed isomerization of Achmatowicz derivatives that opens unexplored routes to diversify the biogenic furanic platform is reported. The mechanistic insights of this formally redox-neutral intramolecular process were studied computationally and by deuterium labeling. The transformation proved to be a robust synthetic tool to achieve the synthesis of bioderived-monomers and a series of 4-keto-δ-valerolactones
报道了 Achmatowicz 衍生物的 Ru 催化异构化,该异构化开辟了使生物源呋喃平台多样化的未开发途径。通过计算和氘标记研究了这种正式的氧化还原中性分子内过程的机理见解。该转化被证明是一种强大的合成工具,可实现生物衍生单体和一系列 4-酮基-δ-戊内酯的合成,进一步促进了合成乙酰基合成的灵活策略的发展。还描述了两种天然产物(即 ( S , S )-muricatacin 和 ( S , S )-L-因子)的简洁且无保护基团的不对称全合成。