Thienyl benzothienyl and dibenzothienyl compounds as inhibitors of
申请人:Imperial Chemical Industries PLC
公开号:US05102905A1
公开(公告)日:1992-04-07
The invention concerns heterocyclic nitromethane derivatives of the formula 1 as defined hereinafter (and their non-toxic salts) wherein the heterocyclic moiety Q is thienyl, benzothienyl or dibenzothienyl and may bear a wide variety of optional substituents, together with pharmaceutical compositions containing them. The nitromethane derivatives are inhibitors of the enzyme aldose reductase and are of value in the treatment of certain complications of diabetes and galactosemia.
Intermolecular carbenoid insertions: Reactions of 2-substituted thiophenes with ethyl diazoacetate in the presence of rhodium (II) acetate
作者:Geoffrey K. Tranmer、Alfredo Capretta
DOI:10.1016/s0040-4020(98)01018-7
日期:1998.12
The reactions of ethyldiazoacetate with a series of 2-substituted thiophenes in the presence of catalytic rhodium (II) acetate were examined. In the cases of 2-methylthiophene and 2-(trimethylsilyl)thiophene, cyclopropane and thiopyran products predominated while thiophene-2-thiol and 2-(methylthio)thiophene gave rise to thiopyrans and ethyl 2-(2-thienylsulfanyl)acetate. No reaction was apparent when
There is provided inter alia a pharmaceutical dosage form for oral administration comprising a sanglifehrin as active ingredient in which the sanglifehrin active ingredient is protected from acid degradation in the stomach environment following oral administration.
Light-Induced Synthesis of Tricyclic Thiolane Derivatives from 2(5H)-thiophenonesvia consecutive radical ring closure
作者:Ren� Kiesewetter、Alan Graff、Paul Margaretha
DOI:10.1002/hlca.19880710225
日期:1988.3.16
Two α,β-unsaturated thiolactones, 5-(2-propynyl)-2(5H)-thiophenone (5) and 3,5-di(2-propenyl)−2(5H)-thiophenone (6), were newly synthesized. Irradiation (λ = 300 nm) of 5 in MeOH containing cyclopentene afforded a 3:1 mixture of diasteroisomeric methyl 7-thiatricyclo[6.4.0.02,6]dodec-10-ene-12-carboxylates (8a/8b), while irradiation of 6 in MeOH saturated with 2-methylpropene gives a 3:2 mixture of
Formation of 2,3-Dihydrothiophene-3-carboxylates from 2(5H)-Thiophenonesvia Sequential Cyclization and Ring-Opening Reactions of 3-Thiahexa-1,5-dienyl Radicals. Preliminary Communication
作者:Ren� Kiesewetter、Paul Margaretha
DOI:10.1002/hlca.19870700115
日期:1987.2.4
Methyl 4-mercapto-2-alkenoates 1, obtained by irradiation of 2(5H)-thiophenones 2 in MeOH, undergo light-induced S–H bond homolysis to give thio radicals 3 which can be trapped with 2-butyne to afford 3-thiahexa-1,5-dienyl radicals 12. Intermediates 12 undergo selective 1,5-ring closure to allylcarbinyl radicals 18, which cyclize to cyclopropylcarbinyl radicals 19. A novel rearrangement of 19 to 23