A free radical reaction between 2-phenylthio-1,4-naphothoquinines and diethyl malonate initiated by manganese(III) acetate is described. This free radical reaction provides a new method for the synthesis of 6,11-dihydro-6,11-dioxo-12H-5-thianaphthacenes. This reaction was performed in various solvents, the best results were obtained in DMSO. With meta substituent on phenylthio ring, this reaction shows unusual high regioselectivity.
All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Organic Chemistry