Reactions of acyl isothiocyanates with 9-diazofluorene: a route to macromolecules having pairs of orthogonal fluorene groups

Synthesis and structure of new imidazo- and pyrazolo[5,1-d][1,2,3,5]thiatriazines based on the reaction of diazoazoles with acyl isothiocyanates controlled by S⋯O interaction

“…Signals at d¼176e180 ppm in compounds 5b,d,f,h,j,l,n,p,o,q,r,t are assigned to the benzoyl carbon, and the signals at d¼160e162 ppm in 5a,c,e,g,i,k,m,p,s to the ethoxycarbonyl carbons and this is in agreement with literature data for these groups in similar compounds. 24,25 Signals at 155.1e160.8 ppm were assigned to carbons of the C 4 ]N groups of the 1,2,3,5-thiatriazine ring based on the careful analysis for spectra of series of compounds 5aes. The signals corresponding to C 9 of the bicycle compounds 5 were observed in broad region of 134e147 ppm depending on the substituents and nature of azole rings.…”