A Simple and Versatile Method for the Synthesis of Acetals from Aldehydes and Ketones Using Bismuth Triflate
作者:Nicholas M. Leonard、Matthew C. Oswald、Derek A. Freiberg、Bryce A. Nattier、Russell C. Smith、Ram S. Mohan
DOI:10.1021/jo0258249
日期:2002.7.1
Acetals are obtained in good yields by treatment of aldehydes and ketones with trialkyl orthoformate and the corresponding alcohol in the presence of 0.1 mol % Bi(OTf)3.4H2O. A simple procedure for the formation of acetals of diaryl ketones has also been developed. The conversion of carbonyl compounds to the corresponding 1,3-dioxolane using ethylene glycol is also catalyzed by Bi(OTf)3.4H2O (1 mol