1.3- Dihydroxy-2,3-dihydro

Dimethylamino-1,3-dihydroxy-2,3-dihydro- 246 2-Dimethylamino-1,3-dioxo-2-athyl-2,3-dihydro- 246... [Pg.973]

Sekundare Nitro-alkane liefern die tiefgefarbten 2,2-disubstituierten 2H-Benzimidazo 1-1,3-bis-oxide322 324 eine Verbindung dieses Typs wird auch mit Diazo-diphenyl-methan326 er-halten. Mit Formaldehyd/Alkali320 bzw. Formaldehyd/prim. Amin327 entstehen 1,3-Dihydroxy-2,3-dihydro-benzimidazole ... [Pg.803]

Sq31 1 a-Acetoxy-6p,93-dit uroyloxy- 2a,4p-dihydroxy-dihydro-p- agarofuran M. cuzcoina EBV [119]... [Pg.87]

In general the double bond seems to be less reactive in neopine than in codeine, e.g. reduction proceeds less readily [3] and oxidation to a dihydroxy dihydro-compound cannot be effected with permanganate [fi]. Noopino is recovered unchanged from attempts to oxidize it to a kototio with chromic aoid [5]. [Pg.124]

Human recombinant AKRs have been shown to catalyze identical reactions for bay region trans-dihydrodiols (phenanthrene, chrysene, B[a]P, benz[a]anthracene), methylated bay region trarcs-dihydrodiols (5-methylchrysene and 7,12-DMBA), and fjord region trans-dihydrodiols (B[g]C) [18-20], Thus far, no human AKR has been show to be an efficient catalyst of the oxidation of the potent proximate carcinogen HR,12R-dihydroxy-dihydro-DB[a,l]P. Interestingly, this metabolic pathway of... [Pg.141]

Matsumura et al. (10) in a detailed study of one of the previous isolates, Pseudomonas sp., proposed the products shown in Figure 2. In contrast to the previous study (8) 6,7-fmfw-dihydroxy-dihydro-aldrin was not identified. The finding of aldrin is interesting because aldrin is converted to dieldrin by many microorganisms aerobically (11). [Pg.260]

Brown trout benzo[a]pyrene Dihydroxy-dihydro-benzo[a]pyrene 3,6-diketo-benzo[a]pyrene 3-hydroxy-benzo[a]pyrene... [Pg.73]

The molecular features of covalent hydration are also present in the dihydroxy series, i.e., in pteridine-2,6-dione (30) and in pteridine-4,6-dione. The latter compound is hydrated only at the C(7)—N(8) double bond, whereas (30) forms two hydrated species, 7-hydroxy-7,8-dihydro- (29) and 4-hydroxy-3,4-dihydro-pteridin-2,6-dione (31) (equation 8). Structure (29) is thermodynamically the more stable substance (31) is formed more rapidly in solution but disappears slowly with time (63JCS5151). Insertion of a 4-methyl group greatly reduces the extent of 3,4- in favour of 7,8-hydration by a blocking effect . [Pg.272]

Benzo[b]furan, 2,3-dihydro-2-phenyl-synthesis, 4, 697 Benzo[b]furan, 2,3-dihydroxy-tautomerism, 4, 37 Benzo[6]furan, 4,6-dimethoxy-acylation, 4, 606 Benzo[6]furan, 2,3-dimethyl-acetylation, 4, 606 bromination, 4, 605 photooxygenation, 4, 642 Benzo[b]furan, 5,6-dimethyl-2,3-diphenyl-applications, 4, 709 Benzo[b]furan, 1,3-diphenyl-vertical ionization potential, 4, 587 Benzo[b]furan, 2-ethoxy-5-hydroxy-synthesis, 4, 127... [Pg.547]

Coumarin, 3,4-dihydro-4-phenyl-synthesis, 3, 848 Coumarin, 6,7-dihydroxy-molecular structure, 3, 622 Coumarin, 7,8-dihydroxy-molecular structure, 3, 622 Coumarin, 6,7-dimethoxy-mass spectra, 3, 610... [Pg.586]

Furan, 2,3-dihydro-5-methyl-polymers, 1, 276 Furan, 2,3-dihydro-3-methylene- H NMR, 4, 577 Furan, 2,5-dihydro-2-methylene- H NMR, 4, 577 tautomerism aromaticity and, 4, 595 Furan, 2,5-dihydro-2-nitro-structure, 4, 550 Furan, 2,3-dihydroxy-tautomerism, 4, 37 Furan, 2,4-dihydroxy-tautomerism, 4, 37 Furan, 3,4-dihydroxy-tautomerism, 4, 37 Furan, 2,5-diiodo-nitration, 4, 602 synthesis, 4, 712 Furan, 3,4-diiodo-reactions, 4, 650 Furan, 2,3-dimethoxy-synthesis, 4, 625, 648 Furan, 2,5-dimethoxy-synthesis, 4, 648 Furan, 3,4-dimethoxy-cycloaddition reactions, 4, 64, 625 lithiation, 4, 651 reactions... [Pg.630]

Indole, 3-(dialkylaminomethyl-) alkylation, 4, 275 Indole, 2,3-dibromo-synthesis, 4, 215 Indole, 2,6-dibromo-3-methyl-synthesis, 4, 215 Indole, 1,3-dichloro-synthesis, 4, 214 Indole, dihydrodehydrogenation, 4, 283, 311 in non-silver photography, 1, 383 Indole, 2,3-dihydro-synthesis, 4, 327, 352 Indole, 2,3-dihydroxy-tautomerism, 4, 37, 199 Indole, 4,6-dimethoxy-... [Pg.667]

Pyrazine, 2,5-dichloro-3,6-difluoro-synthesis, 3, 190-191 Pyrazine, dihydro-, 3, 177 Pyrazine, 1,2-dihydro-oxidation, 3, 178 reduction, 3, 177 Pyrazine, 1,4-dihydro-antiaromaticity, 3, 177-178 synthesis, 3, 177 Pyrazine, 2,3-dihydro-oxidation, 3, 178 Pyrazine, 2,5-dihydro-synthesis, 3, 178 Pyrazine, 3,6-dihydro-synthesis, 3, 184 Pyrazine, 2,5-dihydroxy-oxidation, 3, 175 Pyrazine, 2,3-dimethyl-1,4-dioxide... [Pg.768]

Thiophene, dihydro-2-mercapto-synthesis, 4, 871 Thiophene, dihydroxy-... [Pg.891]

The oxa-Pictet-Spengler reaction has been used with success to prepare dihydrofurano[2,3-c]pyrans and isochromans from l-(3-furyl)alkan-2-ols and 2-(3 ,4 -dihydroxy)phenylethanol, respectively. Furanyl alcohol 32 reacted with isobutyraldehyde 33 in the presence of p-toluenesulfonic acid to give the corresponding CI5-5,7-diisopropyl 4,5-dihydro-7H-furano[2,3-c]pyran 34 in good yield. ... [Pg.473]

ZN(C)153, 00ZN(C)323, 00ZN(C)857, 01MI2, 01MIP4, 01TL5849). 5-Amino-8,9-dihydroxy-2,3-dihydro-l//-pyrimido[l,2-u]quinoline-3-carboxylic acid moiety 4 was also identified as a chromophoric moiety of certain... [Pg.265]

Chemical Name 7-chloro-2,3-dihydro-2,2-dihydroxy-5-phenyl-1 H-1,4-benzodiazepine-3-carboxylic acid dipotassium salt... [Pg.377]

Chamical Nama 7-(2,3-Dihydroxypropyl)-3,7-dihydro-1,3-dimethyl-l H-purine-2,6-dione Common Nama (1,2-Dihydroxy-3-propyl)theophylline diprophylline... [Pg.547]

Chemical Name 2-Methylbutyric acid 9-ester with 9,10-dihydro-9,10-dihydroxy-8,8-di-methyl-2H,8H-benzo[1,2-b 3,4-b l dipyran-2-one acetate... [Pg.1588]

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