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. ... The effect of the NN-diethylcarbamoyl indole protecting group on the reactivity of 2-(1,3-dithian -2-yl)indole 7 in front of a series of electrophiles, as well as the potential synthetic usefulness of the resulting 2,2-disubstituted dithianes is reported. ... The effect of the N,N- ...