2.3- Diphenyl-1 - -1 //-indene

Diphenyl-inden wird durch Lithiumalanat in siedendem Diathylather/Benzol in 85%iger Ausbeute zu 1,3-Diphenyl-indan reduziert4 ... 

III) bei direkter oder sensibilisierter Anregung. Dabci entstehen neben 1,2-Diphenyl-inden... 

Bei entsprechender Beliohtung in Cycloliexan werden 26% VI nachgewiesen und 17% 1,2 Diphenyl -inden (IV) chromatographisch isoliert, Die in Dichlormethan mit 3-Oxo-cyclohexen sensibilisierte Re-aktion liefert, 29,5% V und 14,5% VI. 

Miller and Whelan were perhaps the first to recognize the potential of screening or selecting NHR mutants from receptor libraries to identify ERs with modified ligand specificities [46,47]. Using error prone PCR, they generated populations of mutant ERs in yeast that decreased responsiveness to E2 but has increased responsiveness to the synthetic diphenyl indene-ol GR132706X. Despite their... 

Fig, 3. Extended Br nsted plot for fluorenes and indenes from data of Table IV and ref, 12. The far left point is 1,3-diphenyl-indene the far right is 2,7 di-t-butylfluorene. 

C24H22O, 3-Methoxy-1,4-dimethyl-1,2-diphenyl-indene, 45B, 148 C25H20O2 f endo-6-Methoxy-1,3,6-triphenylbicyclo[3.1.0]hex-3-en-2-one, 41B, 203... 

Highly substituted dimethyl 2,4-diphenyl-3-benzoxepin-l,5-dicarboxylate was converted by irradiation to an indene derivative 4 which had lost one benzoyl group by acidic hydrolysis.146... 

By analogy with the formation of3//-azepines by cycloaddition of 2//-azirines withcyclopenta-dienones, l,3-diphenyl-2//-inden-2-one (58) and its dibenzo analog 60 enter into [4 + 2] cycloadditions with 27/-azirines to give 3//-2-benzazepines 59 and phenanthro[9,10-e]azepincs 61, respectively.96... 

Subsequently the work of R. F. Merritt clearly established the selectivity of additions of fluorine to double bonds in CFC13 at —78°C in preference to reactions with protons. Merritt and co-workers studied such unsaturated systems as indenes and acenapthenes (83), A4 cholestenone (84), 1,1-diphenyl-ethylene (85), Schiff s bases (86), and acetylenes (87). 

H-2,2aA4,3-trithiacylopent[cd]indene. d 2,5-Diphenyl-3,3aA4,4-trithia-l,6-diazapentalene. 2,5-Dianilino-3,3aA4,4-trithia-l,6-diazapentalene. 

The emission properties of anions as for instance carbanions of indene [28], xanthene or thioxanthene [29], fluorene [30, 31], diphenyl propene or penta-diene [32] were also discussed. It was shown that in certain cases, important changes may occur between ground and excited states, increasing the percentage of SSIP when the relaxed excited state is reached [33], Two different types of... 

For the diphenyl substituted case, BLYP favors the Cj-Cg cyclization over the Bergman cyclization. This may be an overestimation as the BCCD(T)/ cc-pVDZ//-BLYP/6-31G(d) computations predict the opposite energy ordering. However, if one corrects the BLYP energies for this overestimation, the Cx-Cg cyclization of 73 remains favored over the Bergman cyclization. In fact, thermolysis of 74 does give only indene product, and thermolysis of 73 at 180 "C gives a small amount of the indene product. 

Photolysis of l,2-bis 2-[diazo(phenyl)methyl]phenyl ethane in a benzene solution containing acrylonitrile gave 2-[2-(2,3-dihydro-l-phenyl-1 //-inden-2-yl)phenyl]-2-phenylcyclopropaneni-trile (6,10%), l,2-bis[2-(2-cyano-l-phenylcyclopropyl)phenyl]ethane(7,18%), 11,14-diphenyl-... 

To a solution of 5-methoxy-l/f-inden-l-one (1.63 g, 10.2 mmol), benzene (20 mL) and CHClj (20 mL) was added, over 2 h via syringe pump, a solution of diphenyldiazomethane (2.22 g, 11.5 mmol) in benzene (15 mL). A gentle reflux was maintained during the addition. After the addition was complete the solution was refluxed for 3 h and then stirred at rt for 18 h. Neutral workup yielded 3.20 g of a purple oil, which was chromatographed on a silica gel column (4x35 cm ) fraction 1 1 L of 2% EtjO in hexane, diphenyl-... 

In the case of 3-aryl-substituted 3//-pyrazoles [e.g. dimethyl 3,3-diphenyl-3//-pyrazole-4,5-dicarboxylate (7)] indene formation often competes with formation of the cycloprop-... 

The major product in the photorearrangement of 3-substituted 2-methyl-1,3-diphenyl-cyclopropenes was an indene produced by cleavage of the ring bond which is methyl- rather than phenyl-substituted, apparently by funneling of the excited state of the cyclopropene to the energy surface of the higher lying carbene triplet. ... 

The following products of alkylation/condensation were detected diphenyl-methane, methyl-diphenylmethane and xylenes plus minor amounts of styrene, benzofuran, indene, naphthalene, stilbene, anthracene and fluorene. Climent et al. [10] observed the formation of diarylmethanes as one of the primary products of acid-catalyzed condensation of benzaldehyde... 

Photochemical cycloaddition has been reported for the dione (248). Irradiation of this compound in the presence of cyclopentadiene affords the adduct (249). Similar adducts. (250) and (251) respectively, are formed when indene and cyclopentene are used as the alkenes. In contrast to the above when six membered ring alkenes such as cyclohexa-1,3-diene and dihydropyran are used cycloaddition occurs at the ring double bond to yield the adducts (252) and (253) respectively. Several examples of the thermal and/or photochemical addition of diphenyl ketene and p-tolyl diphenylketimine to heterocyclic 1,2-diones has been reported. One example of the reaction is that of the... 

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