Showing papers by "Avijit Banerji published in 2005"
TL;DR: Three new sulfur reagents for specific identification of amino acids on thin-layer chromatography plates have been introduced and are capable of developing various distinguishable colors with many of them.
Abstract: Three new sulfur reagents for specific identification of amino acids on thin-layer chromatography plates have been introduced. These three sulfur containing reagents are capable of developing various distinguishable colors with many of them. A probable mechanism for such color formation is proposed.
14 citations
TL;DR: In this article, a series of unexpected cycloadducts along with normal cycloads have been isolated from the 1,3-dipolar cycloaddition of 3,4-dehydromorpholine N -oxide to piperidides of cinnamic acid and para-substituted cinnamides.
12 citations
TL;DR: A straightforward, easy and smooth process of synthesizing indolo[2,3-a]carbazoles, which can frequently serve as a nucleus of several natural products is reported in this paper.
Abstract: A straightforward, easy and smooth process of synthesizing indolo[2,3-a]carbazoles, which can frequently serve as a nucleus of several natural products is reported. The process involves only two st...
11 citations
TL;DR: Aromatic trifluoroacetyl derivatives on treatment with single electron transfer (SET) reagent, sodium naphthalenide, yield symmetrical defluorinated dimers.
7 citations
TL;DR: In this article, the synthesis and structure determination of 3-(naphth-1-ylmethyl)indole were reported, together with the molecular and crystal structures together with molecular formula were determined by spectral and single crystal X-ray studies.
Abstract: Synthesis and structure determination of 3-(naphth-1-ylmethyl)indole are reported. The molecular and crystal structures together with the molecular formula were determined by spectral and single crystal X-ray studies. X-ray crystallography revealed the presence of two conformers arising from the flipping of the naphthalene unit. The crystal of the compound belongs to the triclinic crystal system and space group \(P\bar 1\). Crystal data are as follows: a = 10.302(5) A, b = 12.522(4) A, c = 13.383(4) A, α = 111.9(1)°, β = 116.86(6)°, γ = 71.65(5)°; V = 1726.429 A3; Z = 4. The final R and Rw are R = 0.0744 (on observed F′s); R = 0.0924 (all F data), Rw = 0.1757 (observed F2) and Rw = 0.1834 (all F2 data).
4 citations
TL;DR: Ninhydrin is a widely accepted non-specific reagent with high sensitivity for detection of amino acids; the formation of an identical color with all amino acids except proline and hydroxy proline is, however, a problem if specific detection of the amino acids is required.
Abstract: Protein structure elucidation is very dependent on the detection of its constituent amino acids, because these are the structural units of proteins. They are also found in the free state in a different natural products. Several specific and non-specific reagents have been reported for detection of amino acids [1–6]; of these, ninhydrin is a widely accepted non-specific reagent with high sensitivity. The formation of an identical color (purple/violet) with all amino acids except proline and hydroxy proline is, however, a problem if specific detection of the amino acids is required.
3 citations
TL;DR: In this article, the single electron transfer (SET) reagent sodium naphthalenide was applied to 3-substituted indoles and the results showed that indoles with electron-donating substituents do not respond whereas indoles without electron-withdrawing substituent easily react, yielding several products depending upon the substitusent.
Abstract: Action of the single electron transfer (SET) reagent sodium naphthalenide on 3-substituted indoles revealed that indoles with electron-donating substituents do not respond whereas indoles with electron-withdrawing substituents easily react, yielding several products depending upon the substituent.
1 citations
TL;DR: In this paper, a review of recent developments in 1,3-dipolar cycloadditions of nitrones is presented, focusing on reactions and their explanation on mechanistic and theoretical grounds.
Abstract: This review outlines some recent developments in 1,3-dipolar cycloadditions of nitrones. An attempt has been made to focus on aspects which were comparatively less revealed earlier. Special emphasis has been given on reactions and their explanation on mechanistic and theoretical grounds, rather than on applications.