Palladium catalysed asymmetric alkylation of benzophenone Schiff base glycine esters in ionic liquids

Kim, Dae Hyun; Im, Jin Kyu; Cheong, Minserk; Kim, Hoon Sik; Mukherjee, Debabrata

doi:10.1007/s12039-011-0093-4

Cited by 4 publications

(1 citation statement)

References 54 publications

(37 reference statements)

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“…Their often unique property profiles are extremely low volatility, good thermal stability, wide liquid temperature range, nonflammability, good dissolving ability, low viscosity, negligible vapor pressure, and high ionic conductivity. [21][22][23][24][25][26][27][28][29] The aim of this study is the use of natural amino acid building blocks for efficient synthesis of novel biodegradable and chiral nanostructured PAIs, using molten tetrabutylammonium bromide (TBAB) as green medium. PAIs with main-chain chirality were synthesized via direct step-growth polymerization reaction of different chiral diacids (4a-4d) with 4,4′-methylenebis(3-chloro-2,6-diethylaniline) (MCDEA).…”

Section: Introductionmentioning

confidence: 99%

In vitrostudies on biodegradable chiral nanostructure poly(amide-imide)s containing different natural amino acids in green medium

Mallakpour

Iderli

Rahimmalek

2013

Designed Monomers and Polymers

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α-Amino acids, as one type of the major building blocks of living systems, are the principal components of all naturally occurring peptides and proteins. The aim of this paper was to synthesize and characterize of novel chiral nanostructured poly(amide-imide)s (PAIs) that are biologically active and biodegradable under a natural environment. PAIs were prepared from the polycondensation reaction of optically active diacids monomers containing different natural amino acids with 4,4′-methylene bis(3-chloro-2,6-diethylaniline) in molten tetrabutylammonium bromide as a green solvent. In vitro fungal colonization and weight loss studies showed that the synthetic polymer having alanine amino acid is biologically more active compared to the other components, nontoxic to microbial growth and could be classified as biodegradable compounds. The synthesized PAIs were characterized by different techniques. The field-emission scanning electron microscopy showed that the obtained PAIs were nanostructured polymers.

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Section: Introductionmentioning

confidence: 99%

In vitrostudies on biodegradable chiral nanostructure poly(amide-imide)s containing different natural amino acids in green medium

Mallakpour

Iderli

Rahimmalek

2013

Designed Monomers and Polymers

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ChemInform Abstract: Palladium Catalyzed Asymmetric Alkylation of Benzophenone Schiff Base Glycine Esters in Ionic Liquids.

Kim

et al. 2011

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Synthesis of novel nanostructured chiral poly(amide-imide)s containing dopamine and natural amino acids

Mallakpour

Zadehnazari

2013

J Chem Sci

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Four new thermally stable and optically active poly(amide-imide)s (PAI)s with good inherent viscosities were synthesized from the direct polycondensation reaction of N,N-(pyromellitoyl)-bis-L-α-amino acids with 3,5-diamino-N-(3,4-dihydroxy-phen-ethyl)benzamide in a medium consisting of a molten salt, tetrabutylammonium bromide, and triphenyl phosphite as the activator. The polymerization reactions produced a series of novel PAIs containing dopamine segment in the side chain in high yield with inherent viscosities between 0.33 and 0.49 dL/g. The obtained polymers were typically characterized by means of FT-IR, 1 H NMR spectroscopy, elemental analyses, powder X-ray diffraction, field emission scanning electron microscopy, inherent viscosity, and solubility tests. Thermal properties and flame retardant behaviour of the PAIs were also investigated using thermal gravimetric analysis (TGA and DTG) and limiting oxygen index (LOI). Data obtained by thermal analysis revealed that these polymers showed good thermal stability. Furthermore, high char yield in TGA and good LOI values indicated that the obtained polymers were capable of exhibiting good flame retardant properties.

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Palladium catalysed asymmetric alkylation of benzophenone Schiff base glycine esters in ionic liquids

Cited by 4 publications

References 54 publications

In vitrostudies on biodegradable chiral nanostructure poly(amide-imide)s containing different natural amino acids in green medium

In vitrostudies on biodegradable chiral nanostructure poly(amide-imide)s containing different natural amino acids in green medium

ChemInform Abstract: Palladium Catalyzed Asymmetric Alkylation of Benzophenone Schiff Base Glycine Esters in Ionic Liquids.

Synthesis of novel nanostructured chiral poly(amide-imide)s containing dopamine and natural amino acids

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