2,3-Dichloro-5,6-dicyanobenzoquinone (DDQ) mediated oxidation-dehydrogenation of 2-aroyl-3,4-dihydro-2H-benzopyrans : synthesis of 2-aroylbenzopyran-4-ones - Liang-Yeu Chen; Sie-Rong Li; Po-Yuan Chen; Ho-Chiang Chang; Tzu-Pin Wang; Ian-Lih Tsai; Eng-Chi Wang (ARKIVOC, 2010)