Manas Jyoti Sarma
Gauhati University
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Publication
Featured researches published by Manas Jyoti Sarma.
Synthetic Communications | 2015
Indranirekha Saikia; Pranita Chakraborty; Manas Jyoti Sarma; Mridusmita Goswami; Prodeep Phukan
Abstract N,N-Dibromo-p-toluenesulfonamide (TsNBr2) has been found to be a new reagent for bromination of aromatic compounds. The reaction is extremely fast and goes into completion instantaneously at ambient temperature to produce exclusively the corresponding polybrominated product. This procedure is applicable to various phenols, anisole, and anilines to give corresponding polybrominated compound as a single product in excellent yield. GRAPHICAL ABSTRACT
Synthetic Communications | 2016
Manas Jyoti Sarma; Prodeep Phukan
ABSTRACT A new catalyst-free protocol for C-N bond formation via the cleavage of α-nitroketone has been developed. When α -nitroketones are treated with TsNBr2 in the presence of potassium carbonate, unexpected cleavage of C(O)-CHNO2 bond of α -nitroketone was observed followed by the formation of corresponding amide. Various nitroketones could be converted to corresponding amide using this procedure. GRAPHICAL ABSTRACT
Journal of Fluorescence | 2015
Jutika Kumar; Manas Jyoti Sarma; Prodeep Phukan; Diganta Kumar Das
N-benzylidenenaphthalen-1-amine (L) acts as pH dependent “off-on”, “off-on-off” and “on-off” fluorescent switch in 1:1 (v/v) CH3CN:H2O depending on the presence of anionic sodiumdocdecyl sulphate (SDS), neutral triton X-100 (TX-100) and cationic cetyltrimethylammonium bromide (CTAB) surfactants respectively. DFT calculation shows the possibility of formation of L.H+ due to protonation at immine N and L.OH− due to introduction of OH− group at immine C. The relative stability of these two cationic and anionic species depends on the charge environment provided by surfactants. This influences the photoinduced electron transfer (PET) processes involved and results in different switch behaviour.
Synthetic Communications | 2018
Manas Jyoti Sarma; Prodeep Phukan
ABSTRACT A metal free noncatalytic amination process has been developed for the synthesis of N-substituted aniline using a new amine source. The amine source p-toluene sulfonyl triazene (PhN˭NNHTs) has been prepared by treating aryldiazonium salt with p-tosylamide. Various unsymmetrical amines could be synthesized by treating this reagent and boronic acid in toluene at 110 °C in the presence of DBU and 4 Å molecular sieve. A large variety of N-substituted aniline could be synthesized with moderate yield. GRAPHICAL ABSTRACT
Dalton Transactions | 2015
Jutika Kumar; Manas Jyoti Sarma; Prodeep Phukan; Diganta Kumar Das
Chemical Communications | 2016
Subhasish Roy; Manas Jyoti Sarma; Bishwapran Kashyap; Prodeep Phukan
Tetrahedron | 2014
Prasanta Gogoi; Sukanya Hazarika; Manas Jyoti Sarma; Kuladip Sarma; Pranjit Barman
Tetrahedron Letters | 2014
Kamal Krishna Rajbongshi; Manas Jyoti Sarma; Prodeep Phukan
Tetrahedron Letters | 2015
Manas Jyoti Sarma; Arun Jyoti Borah; Kamal Krishna Rajbongshi; Prodeep Phukan
Monatshefte Fur Chemie | 2015
Rajsekhar Lodh; Manas Jyoti Sarma; Arun Jyoti Borah; Prodeep Phukan