Organocatalytic Electrochemical C–H Lactonization of Aromatic Carboxylic Acids
作者:Sanzhong Luo、Longji Li、Qi Yang、Zongbin Jia
DOI:10.1055/s-0036-1591558
日期:2018.8
Radical Methods and their Strategic Applications in Synthesis Abstract An electrochemical strategy has been developed for radical arene carbon–oxygen bond formation. This reaction utilizes DDQ as a redox mediator, with inexpensive glassy carbon electrodes to facilitate an intramolecular lactonization of biphenyl-2-carboxylic acid derivatives via aromatic carboxyl radical substitution to give 6H-be
§这些作者同等贡献。 作为特别主题“现代自由基方法及其在合成中的战略应用”的一部分发布 抽象的 已经开发出一种用于自由基芳烃碳-氧键形成的电化学策略。该反应利用DDQ作为氧化还原介体,并具有廉价的玻璃碳电极,以通过芳族羧基自由基取代促进联苯-2-羧酸衍生物的分子内内酯化,得到6 H-苯并[ c ] chromen-6-one。 已经开发出一种用于自由基芳烃碳-氧键形成的电化学策略。该反应利用DDQ作为氧化还原介体,并具有廉价的玻璃碳电极,以通过芳族羧基自由基取代促进联苯-2-羧酸衍生物的分子内内酯化,得到6 H-苯并[ c ] chromen-6-one。
Pd-Catalyzed C–H Lactonization for Expedient Synthesis of Biaryl Lactones and Total Synthesis of Cannabinol
作者:Yan Li、Yan-Jun Ding、Jian-Yong Wang、Yi-Ming Su、Xi-Sheng Wang
DOI:10.1021/ol400877q
日期:2013.6.7
cyclization to construct biaryl lactones has been developed. The synthetic utility of this new reaction was demonstrated in an atom-economical and operationally convenient total synthesis of the natural product cannabinol from commercially available starting materials, with the newly developed method used for two key steps.
Use of 2-(methoxycarbonyl)phenyllead triacetate in lactone synthesis
作者:B. A. Maryasin、A. S. Shavyrin、J.-P. Finet、A. Yu. Fedorov
DOI:10.1007/s11172-006-0462-1
日期:2006.9
Reactions of 2-(methoxycarbonyl)phenyllead triacetate with β-oxo lactones and phenols in the presence of pyridine afforded polycyclic lactones in good yields. A one-pot three-step synthesis without isolation of intermediate products was developed.
Catalyst-free synthesis of diversely substituted 6H-benzo[c]chromenes and 6H-benzo[c]chromen-6-ones in aqueous media under MWI
作者:Yan He、Xinying Zhang、Liangyan Cui、Jianji Wang、Xuesen Fan
DOI:10.1039/c2gc36379h
日期:——
6H-benzo[c]chromenes and 6H-benzo[c]chromen-8-ols via cascade reactions of 2-(2-(allyloxy)phenyl)furan and 2-(2-(prop-2-ynyloxy)phenyl)furan, featured with intramolecular Diels–Alder reactions of furan with unactivated alkene/alkyne in aqueous media under MWI, was developed. In addition, an environmentally friendly oxidation of 6H-benzo[c]chromenes into the corresponding benzo[c]chromen-6-ones using aqueous
在本文中, 催化剂不同地取代的6的-free合成ħ -苯并[ c ^ ]色烯和6 ħ -苯并[ c ^ ]苯并吡喃-8-醇通过的级联反应2-(2-(烯丙氧基)苯基)呋喃 和 2-(2-(丙-2-炔氧基)苯基)呋喃,具有分子内Diels–Alder反应 呋喃 与未激活 烯烃/炔烃在MWI下的水性介质中进行了开发。另外,环保氧化作用还揭示了在没有任何活化剂/催化剂的情况下,使用H 2 O 2作为氧化剂,将6 H-苯并[ c ]色烯转化为相应的苯并[ c ]色烯-6 。