Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... On irradiation (>290 nm) in the absence or presence of benzophenone, various aromatic aldehydes add to ketene dithioacetal S,S-dioxides to give the corresponding 1:1 adducts, which were shown to be synthetic precursors of indanone derivatives. ... On irradiation, aromatic aldehydes ...