Azulenes and related substances—XV

Mittal, Rupali; Sethi, S. C.; Dev, Sukh

doi:10.1016/s0040-4020(01)83151-3

Cited by 11 publications

(10 citation statements)

References 18 publications

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“…Hydrolysis of 11 to a,b-diphenylsuccinic acid (12) and subsequent cyclization to ketone 9 followed the procedure of Mittal et al [9]. For the reduction of 9 to 8 a modification of the method of Naemura et al [10] was employed.…”

Section: Resultsmentioning

confidence: 99%

“…Synthesis of diketone 9 and diol 8 cis-4b,5,9b,10-Tetrahydroindeno[2,1-a]indene-5,10-dione (9). The a,b-diphenylsuccinonitrile (11) was prepared from benzaldehyde, phenylacetonitrile and sodium cyanide using the procedure described in Organic Synthesis [8].…”

Section: Apparatusmentioning

confidence: 99%

“…The a,b-diphenylsuccinonitrile (11) was prepared from benzaldehyde, phenylacetonitrile and sodium cyanide using the procedure described in Organic Synthesis [8]. The dinitrile 11 was hydrolyzed using a mixture of sulphuric acid and acetic acid [9] Mass spectrum (m/z; relative abundance %): 50 (7) cis-4b,5,9b,10-Tetrahydroindeno[2,1-a]indene-5,10-diol (8). A mixture of diketone 9 (0.5 g; 2.14 mmol), NaBH 4 (0.74 g; 20 mmol) in 30 mL methanol was stirred at room temperature for 15 h. Most of the solvent was vacuumevaporated and the residual mixture was poured over 50 mL cold water.…”

Section: Apparatusmentioning

confidence: 99%

See 2 more Smart Citations

Flow-vacuum pyrolysis of cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-diol and cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-dione

Simion

Drăghici

Schiketanz

et al. 2006

Journal of Analytical and Applied Pyrolysis

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Section: Resultsmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

See 1 more Smart Citation

Flow-vacuum pyrolysis of cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-diol and cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-dione

Simion

Drăghici

Schiketanz

et al. 2006

Journal of Analytical and Applied Pyrolysis

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“…The key starting compound was diphenylsuccindanedione 2 [13][14][15], which was synthesized from diphenylsuccinic acid. Treatment of 2 with phenylmagnesium bromide and p-tolylmagnesium bromide followed by an addition of ammonium chloride afforded the corresponding diols 3a and 3b, respectively (Scheme 1) [12].…”

Section: Early Studies On the Preparation Of Dibenzopentalenesmentioning

confidence: 99%

Synthesis and Reactions of Dibenzo[a,e]pentalenes

Saito

2010

Symmetry

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Pentalene has recently received a considerable amount of attention as a ligand in sandwich-type transition metal complexes. In contrast, dibenzo[a,e]pentalene (hereafter denoted as dibenzopentalene), which is more -extended than pentalene, has received less attention, despite its potential usefulness as a building block of ladder-type -conjugated molecules, which have recently received growing interest. However, very recently, several novel efficient methods for the synthesis of dibenzopentalenes have been reported. This review surveys recent advances in the synthesis and reactions of dibenzopentalenes and describes the aromaticity of their ionic species.

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“…This feature recurs even twice in the 1,1¢-spirobiindanes [50] (cf. 13) and also in C 2 -symmetrical mono-fuso-diindanes [51], such as the parent of the methyl derivative 14. Notably, however, there appears to be no report on the C s -symmetrical isomer 15 of triptindane (5), also bearing two "irregularly" fused neopentane atoms.…”

Section: Irregular Centropolyindanesmentioning

confidence: 99%

The Centropolyindanes and Related Centro-Fused Polycyclic Organic Compounds

Kuck

1998

Topics in Current Chemistry

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Centropolyindanes constitute a complete family of arylaliphatic polycyclic hydrocarbons containing several indane units. Mutual fusion of the five-membered rings leads to three-dimensional, carbon-rich molecular frameworks bearing a central carbon atom, such as benzoannelated [3.3.3]propellanes, triquinacenes, and [5.5.5.6]-and [5.5.5.5]fenestranes. In this review, the structural concept of centropolyindanes is contrasted to other fused indane hydrocarbons. Besides the syntheses of the parent centropolyindanes and recently described related indane hydrocarbons, the preparation of a large variety of bridgehead and arene substituted centropolyindanes is presented including strained, heterocyclic, and centrohexacyclic derivatives. In appropriate cases, the particular reactivity and some structural features of these unusual, sterically rigid polycyclic compounds are pointed out.

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Azulenes and related substances—XV

Cited by 11 publications

References 18 publications

Flow-vacuum pyrolysis of cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-diol and cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-dione

Flow-vacuum pyrolysis of cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-diol and cis-4b,5,9b,10-tetrahydroindeno[2,1-a]indene-5,10-dione

Synthesis and Reactions of Dibenzo[a,e]pentalenes

The Centropolyindanes and Related Centro-Fused Polycyclic Organic Compounds

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