Über einige Derivate des α, β‐Pyridin‐thioindoxyls.

Fischer Synthesis of 1H- and 3H-[1]Benzothieno[3,2-b]pyrroles

“…7.1-7.9 ppm as an ABCD system with coupling constants 3 J AB = 7.9 Hz, 3 J BC = 7.2 Hz and 3 J CD = 7.9 Hz. 10 The 3Hpyrroles were also characterized by 13 C NMR spectroscopy, the main features of which were the signals arising from C-3 at d = 54-73 ppm.…”

“…Column chromatography was performed with silica gel 60 (70-230 mesh) purchased from Merck. 1-Benzothiophen-2-yl acetate (13a), 11 5-nitro-1-benzothiophen-2-yl acetate (13b) 12 and thieno[2,3-b]pyridin-3-ol (12c) 13 were prepared by known procedures. Ethyl 4-hydroxy-2-methyl-5-(2-oxopropyl)-3-thiophenecarboxylate (2g), ethyl 5-[2-(4-bromophenyl)-2-oxoethyl]-4hydroxy-2-methyl-3-thiophenecarboxylate (2h) 8 and 1-benzothiophen-3(2H)-one hydrazone (1) 6 were prepared according the procedures described earlier.…”

“…Methyl-2,3,4,4a-tetrahydro-1H-[1]benzothieno[3,2-b 3 J = 5.9 Hz, 1 H, CH), 2.81-2.93 (m, 1 H, CH), 7.24 (dd, J = 7.3, 7.9 Hz, 1 H, H-Ar), 7.38 (dd, J = 7.3, 7.9 Hz, 1 H, H-Ar), 7.76 (d, J = 7.9 Hz, 1 H, H-Ar), 8.08 (d, J = 7.9 Hz, 1 H, H-Ar). 13 C NMR (62.9 MHz, CDCl 3 ): d = 20.23, 21.36, 29.70, 30.41, 39.66, 55.21 (3-C), 121.14, 123.85, 123.90, 124.79, 130.50, 143.51, 144.51, 151.42, 192.32 (2-C). Anal.…”