The synthesis of some thiophenophanes and attempted cyclisations to polycyclic thiophenium salts

Preparation of donor–acceptor substituted fluorostilbenes and crystal chemistry of fluorinated (E)-4-(4-halogeno-styryl)-benzonitriles

“…In contrast, the series X-C 6 H 4 -CH CH-C 6 F 4 -CN (22)(23)(24) showed a bathochromic shift (red shift) compared to the Hhomologues (16)(17)(18). This is due to the inversion of the charge distribution, which has been described in our previous work on the subject, calculated for the bromo derivatives [3].…”

“…The UV spectra of the perfluorinated X-C 6 F 4 -CH CH-C 6 F 4 -CN series (25)(26)(27) as well as the partial fluorinated X-C 6 F 4 -CH CH- C 6 H 4 -CN (19)(20)(21) analogues showed a hypsochromic shift (blue shift) compared to the H-homologues X-C 6 H 4 -CH CH-C 6 H 4 -CN (16)(17)(18). In contrast, the series X-C 6 H 4 -CH CH-C 6 F 4 -CN (22)(23)(24) showed a bathochromic shift (red shift) compared to the Hhomologues (16)(17)(18).…”

“…4-iodobenzaldehyde 3 was prepared as described in the literature [18], by reduction (NaBH 4 ) followed by an oxidation step with CrO 3 /pyridine/MeCl 2 (PCC) (Scheme 2).…”

“…12.063 (2) 12.1462 (9) 27.182 (2) 17.1887 (16) 12.0296 (13) 10.348 (3) 12.239 (3) 12.5299 (17) 13.9210 (8) 35.668 (4) 37.386 (7) 13.7580 (11) 12.998 (3) 12.914 (3) 13.946 (3) 10.368 (2) a ( (14) 92.09 (3) b (8) 99.29 (3) 99.557 (6) 94.462 (9) 109.350 (7) 92.662 (8) 94.99 (3) 96.147 (19) 97.490 (10) 127.109 (4) 92.797(9) 94.87 (3) 77.778 (7) 99.199 (18) 99.09 (3) 84.745 (15) (2) 153 (2) 173 (2) 153 (2) 173 (2) 173 (2) 173 (2) 173 (2) 173 (2) 153 (2) 173 (2) 173 (2) 173 (2) 173 (2) 173 (2) 173 (2) SOF 0.553 (11) (2) 3.039 144.96 C (18) (10) 2.908 160.31 (11) 2.649 152.44 (14) 2.836 148.17 …”

Integrated Chemical Process: One-Pot Double Elimination Method for Acetylenes

“…Preparation of aldehydes: Aldehyde 2 f was prepared by Swern oxidation of 2-iodobenzyl alcohol. [23] Other aldehydes were prepared as follows. To a THF solution (40 mL) of 1 b (1.80 g, 5.91 mmol) was added BuLi (3.70 mL of the hexane solution, 5.91 mmol) at À 78 8C, and the mixture was stirred for 1 h. To this solution was added 2 a (530 mg, 4.96 mmol) in THF (10 mL), and the mixture was stirred for 1 h. Diethyl chlorophosphate (0.70 mL, 4.96 mmol) was added and the mixture was stirred for 1 h at room temperature.…”