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. ... UV-laser photochemistry: Retro-cleavage in the benzophenone-sensitized photolysls of Δ 3 -1,3,4-Oxadiazolines into diazoalkanes. ... Triplet-sensitized photolysis of 2-methoxy-2,5,5-trimethyl -Δ 3 -1,3,4-oxadiazoline (1a) led to the retro-cleavage products diazoalkane 2a and the ...