1)J. Chem. Soc., Perkin Trans. 1, 1977, 505 - 510
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http://dx.doi.org/10.1039/P19770000505Gurnos Jones and Michael J. Robinson
On irradiation, methanolic solutions of the cycloheptathiophen-4-ones (5)–(7) give dimers, shown by spectral evidence to be [ 4 +2] dimers, formed by reaction of the 5,6-bond of one thienotropone molecule with the 5,7-diene system of another. The dimers are of the head-to-head type and have a trans-ring junction. Irradiation of 2,6-dimethylcycloheptathiophen-4-one (8) leads to an intramolecular electrocyclic disrotatory reaction, giving a tricyclic ketone (14). The syntheses of the parent cycloheptathiophenone (5) and of the 7-methyl derivative (8) are described, and that of 7,8-dihydro-2-methylcycloheptathiophen-4-one (17).
2)J. Chem. Soc., Perkin Trans. 1, 1986, 729 - 732
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http://dx.doi.org/10.1039/P19860000729Kyosuke Satake, Kenji Itoh, Yoshiko Miyoshi, Masaru Kimura and Shiro Morosawa
The 7-benzyl-5,6,7,8-tetrahydro-4H-thieno[2,3-c]azepin-4-one (11) has been synthesized from the N-benzyl-N-(2-thenyl)--alanine (10) by a tin(IV) chloride-catalysed Friedel-Crafts cyclization. In addition, N-benzyl- and N-(p-tolylsulphonyl)-N-(3-thenyl)--alanine (16a) and (16b) cyclized more effectively to give 5-benzyl- and 5-(p-tolylsulphonyl)-4,5,6,7-tetrahydro-8H-thieno[3,2-c]azepin-8-one (17a) and (17b), respectively. Attempts to remove the p-tolylsulphonyl group from compound (17b) was achieved by use of polyphosphoric acid (PPA) and afforded the 4,5,6,7-tetrahydro-8H-thieno[3,2-c]azepin-8-one (19). In contrast, 7-bromo-5-(p-tolylsulphonyl)-4,5,6,7-tetrahydro-8H-thieno-[3,2-c]azepin-8-one (20) gave the novel heterocyclic system, 6,7-dihydroazirino[1,2-a]-thieno[2,3-d]pyridin-8-one (22) under similar conditions.
3)J. Heterocycl. Chem., 29 (1992) N 5, S 1213-1217
De Asish, Bhattacharya Subhra, Jash Sagar S., Mukherjee Soumitra, SahaUttam, Sen Parimal K
Studies in sulphur heterocycles. Tricyclie compounds related to 5,6,7,8-tetrahydro-4H-cycloheptathiophene
4)J. Heterocycl. Chem., 32 (1995) N 2, S 403-405
Berkes Dusan, Bar Nathalie, Decroix Bernard
Stereoselective reduction of new fused azoninones with a bridgehead nitrogen
5)J. Heterocycl. Chem., 33 (1996) N 4, S 1251-1258
Mamouni Aiecha, Daiech Adam, Decroix Bernard
Synthesis and reactivity of oxopyrrolidinothieno[2]azepinones: [3]benzazepine antidepressant analogs
6)J. Heterocycl. Chem, (1985), 22, N 4, 1011-1016
FREHEL, D.;BADORC, A.;PEREILLO, J. -M.;MAFFRAND, J. -P.:
NEW SYNTHESIS OF 5,6,7,8-TETRAHYDRO-4H-THIENO<2,3-D>AZEPINE
