A catalyst-free, facile and efficient approach to cyclic esters: synthesis of 4H-benzo[d][1,3]dioxin-4-ones
作者:Feng Lin、Qiuling Song、Yuyu Gao、Xiuling Cui
DOI:10.1039/c4ra01651c
日期:——
A metal and additive free base-mediated method for the formation of 4H-benzo[d][1,3]dioxin-4-one and its derivatives, from salicylic acids and dichloromethane, was developed using dichloromethane (DCM) and 1,1-dichloroethane (1,1-DCE) as the C1 source.
Copper-catalyzed synthesis of benzo[d][1,3]dioxin-4-ones via tandem Ar–halogen bond hydroxylation and dichloromethane-based double Williamson etherification
作者:Yunyun Liu、Meiying Huang、Li Wei
DOI:10.1039/c7nj00180k
日期:——
The copper-catalyzed tandem reactions of o-halobenzoic acids, dichloromethane and KOH giving benzo[d][1,3]dioxin-4-ones via tandem Ar–X hydroxylation and double Williamson etherification are reported.