Synthesis and reactivity of 2-formylindole and 5-formylpyrrole derivatives

Ryabova, S. Yu.; Trofimkin, Yu. I.; Azimov, V. A.; Алексеева, Л. М.; Граник, В. Г.

doi:10.1007/bf02226525

Cited by 2 publications

(5 citation statements)

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“…36 The reaction of 5-formyl-substituted pyrrole 25 with cyanoacetamide or ethyl cyanoacetate produced the corresponding 5-vinylpyrroles 26. 37 Condensation of aldehyde 27 with ethyl cyanoacetate was used for protection of the aldehyde group of pyrrole in the synthesis of the acetylene-and cumulene-containing porphyrinoid 28. 38 Scheme 1 was employed for the preparation of functionalised vinylpyrroles 29 ± 31.…”

Section: Condensation Of Formylpyrroles With Ch-acidsmentioning

confidence: 99%

“…Hydrolysis of the ester group in the resulting vinylpyrrole 32 under the action of trifluoroacetic acid yielded vinylpyrrolecarboxylic acid 33, which was transformed into 5-bromo-2-vinylpyrrole 34. 39 4-Bromo-2-(2-cyano-2-methoxycarbonylvinyl)pyrrole (36) was prepared by condensation of 4-bromo-2-formylpyrrole (37) with methyl cyanoacetate. 40 c. Condensation with malonic acid and its esters Functionalised 5-hydroxy-4-vinylpyrrole 38 was synthesised from 4-formyl-5-hydroxypyrrole 39 and malonic acid.…”

Section: Condensation Of Formylpyrroles With Ch-acidsmentioning

confidence: 99%

“…43 The 5-formyl-substituted pyrrole 25 reacted with Meldrum's acid on refluxing in isopropyl alcohol in the presence of triethylamine to give 5-vinylpyrrole 50. 37 Condensation of 2-acetylpyrrole (51) with Meldrum's acid (48) 59) reacted with ethyl azidoacetate to form bis(azidovinyl)pyrrole 60. Treatment of the latter with triphenylphosphine afforded divinylpyrrole 61 containing the iminophosphorane functional groups.…”

Section: Condensation Of Formylpyrroles With Ch-acidsmentioning

confidence: 99%

“…Enaminoketone 432a reacted with malononitrile to form salt 433a whose acidification gave rise to 5-(2,2-dicyanovinyl)-3-ethoxycarbonyl-4-hydroxy-2-methylpyrrole 434a. 34,37 Vinylpyrroles 434b,c were synthesised from enaminoketone 432b and derivatives of cyanoacetic acid upon refluxing in isopropyl alcohol. 34 Under the same conditions, the enaminoketone 432b reacted with Meldrum's acid and dimedone to give vinylpyrrole derivatives 434d,e.…”

Section: Synthesis From Enaminoketones Of the Pyrrole Seriesmentioning

confidence: 99%

“…, 4-MeC6H4, 4-MeOC6H4, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 3-MeOC6H4, 3-BrC6H4. Vinylpyrrole 76 was synthesised from 5-formylpyrrole 25 and dimedone(75) 37.…”

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Synthesis ofC-vinylpyrroles

Собенина¹,

Demenev²,

Михалева³

et al. 2002

Russ. Chem. Rev.

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X-ray magnetic circular dichroism serves as a strong element-specific magnetic contrast mechanism in full-field transmission soft x-ray microscopy to image micromagnetic domain structures. A lateral resolution down to 25 nm is provided by Fresnel zone plates used as optical elements. Recording the images in varying external magnetic fields and the sensitivity to the direction of the magnetization allows for detailed studies of static magnetization reversal processes in magnetic thin films and nanopatterned elements. Results on highly magnetostrictive Terfenol-D layers are reported. The experimental findings of the switching processes in soft magnetic permalloy rectangular structures are consistent with micromagnetic simulations. The pulsed time structure of polarized synchrotron radiation allows for a stroboscopic imaging of spin dynamics on a sub-nanosecond timescale.

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Section: Condensation Of Formylpyrroles With Ch-acidsmentioning

confidence: 99%

Section: Condensation Of Formylpyrroles With Ch-acidsmentioning

confidence: 99%

Section: Condensation Of Formylpyrroles With Ch-acidsmentioning

confidence: 99%

Section: Synthesis From Enaminoketones Of the Pyrrole Seriesmentioning

confidence: 99%

“…, 4-MeC6H4, 4-MeOC6H4, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 3-MeOC6H4, 3-BrC6H4. Vinylpyrrole 76 was synthesised from 5-formylpyrrole 25 and dimedone(75) 37.…”

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confidence: 99%

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