In 2019,Chemistry – An Asian Journal included an article by Ni, Jixiang; Jiang, Yong; Qi, Zhenjie; Yan, Rulong. Category: tetrahydrofurans. The article was titled 《TFAA-Catalyzed Annulation Synthesis of Spiro Pyrrolo[1,2-a]quinoxaline Derivatives from 1-(2-Aminophenyl)pyrroles and Benzoquinones/Ketones》. The information in the text is summarized as follows:
A metal-free trifluorosulfonate anhydride (TFAA)-catalyzed strategy for the synthesis of spiro pyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and benzoquinones/ketones was developed. With this general method, spiro pyrrolo[1,2-a]quinoxalines were accessed via nucleophilic addition and cyclization. This reaction exhibited good functional group tolerance and a wide range of products were obtained in moderate to good yields. The results came from multiple reactions, including the reaction of 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Category: tetrahydrofurans)
2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.Category: tetrahydrofurans
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem