TiCl4-promoted intramolecular cyclization of 4-methoxy-5-arylethyl-1,3-dioxolan-2-ones: an expedient method to prepare 2-tetralones
摘要:
DABCO is a very effective calalyst in the formation of 4-methoxy-5-arylethyl-1,3-dioxolan-2-ones 12 from the corresponding alpha-carbonatoaldehyde. Intramolecular, cyclization of cyclic carbonates 12 promoted by TiCl4 affords 2-tetralones 13 containing a variety of substituents in high yields 2009 Elsevier Ltd. All rights reserved
Dearomatization of (Hetero)arenes through Photodriven Interplay between Polysulfide Anions and Formate**
作者:Eugene Yew Kun Tan、Amirah S. Mat Lani、Wayne Sow、Yuliang Liu、Haoyu Li、Shunsuke Chiba
DOI:10.1002/anie.202309764
日期:2023.10.2
protocol was developed for the dearomatization of substitutednaphthalenes, indoles, and related heteroaromatic compounds through a radical-polar crossover mechanism induced by single-electron transfer from photoexcited polysulfide anions in the presence of methanol. The catalytic turnover is maintained by hydrogen-atom transfer between polysulfide radical anions and formate.