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. ... Low-temperature photooxygenation of furan derivatives followed by treatment with dimethyl sulfide and trimethylsilyl cyanide provides 2-cyano-5-hydroxy-2,5-dihydrofurans which are converted to 4-cyanobutenolides. ... Furans were transformed into 2-cyano-5-hydroxy-2,5- ...