SYNTHESIS AND NMR-STUDY OF 1-TRIFLUOROMETHYLAZULENE, 2-TRIFLUOROMETHYLAZULENE AND 6-TRIFLUOROMETHYLAZULENE

The preparation of 1-, 2- and 6-trifluoromethylazulenes by a modified Burton reaction employing sodium trifluoroacetate is described. By the same method 1- and 2-trifluoromethylnaphthalenes have been made. The H-1 and C-13 n.m.r. spectra have been assigned on the basis of F-19/H-1 and F-19/C-13 coupling, by H-1/C-13 correlation, and by prediction based on estimated substituent effects.