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4 results on '"Moumita Roy"'

1. Layered-Double-Hydroxide-Supported Rhodium(0): An Efficient and Reusable Catalyst for theHeck-Type Coupling of Alkenes and Arylboronic Acids

Author

Rajiv Trivedi, Moumita Roy, and Sarabindu Roy

Subjects
Coupling, Chemistry, Organic Chemistry, chemistry.chemical_element, Biochemistry, Catalysis, Rhodium, Inorganic Chemistry, chemistry.chemical_compound, Drug Discovery, Polymer chemistry, Hydroxide, Physical and Theoretical Chemistry
Abstract

Layered-double-hydroxide-supported nanorhodium catalyst (LDHRh(0)) was employed in the Heck-type coupling of alkenes 1 with arylboronic acids 2 to afford the corresponding substituted alkenes 3 in good to high yields (Table 1). The catalyst was separated by simple filtration and reused for five cycles with consistent activity.

Published
2008
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2. Copper-FreeSonogashira Coupling of Acid Chlorides with Terminal Alkynes in the Presence of a Reusable Palladium Catalyst: An Improved Synthesis of 3-Iodochromenones (=3-Iodo-4H-1-benzopyran-4-ones)

Author

Moumita Roy, Pravin R. Likhar, Sarabindu Roy, M. Lakshmi Kantam, and M. S. Subhas

Subjects
Chemistry, Organic Chemistry, chemistry.chemical_element, Sonogashira coupling, Biochemistry, Copper, Medicinal chemistry, Catalysis, Benzopyran, Inorganic Chemistry, Cerium, chemistry.chemical_compound, Yield (chemistry), Drug Discovery, Ammonium, Physical and Theoretical Chemistry, Palladium catalyst
Abstract

Pd/C is used as an efficient catalyst for the copper-free Sonogashira coupling of acid chlorides and terminal alkynes to afford ynones in high yields (Tables 1 and 3). Cyclization of (2-methoxyaryl)-substituted ynones induced by I2/ammonium cerium(IV) nitrate (CAN) at room temperature gave 3-iodochromenones (=3-iodo-4H-1-benzopyran-4-ones) in excellent yield (Table 4).

Published
2008
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3. LayeredDoubleHydroxideSupported Rhodium0: An Efficient and Reusable Catalyst for the HeckType Coupling of Alkenes and Arylboronic Acids.

Author

Sarabindu Roy, Moumita Roy, and Rajiv Trivedi

Subjects
*LAYERED double hydroxides, *CATALYST supports, *ALKENES, *SEPARATION (Technology), *HYDROXIDES, *NANOSTRUCTURED materials, *FILTERS & filtration
Abstract

Layereddoublehydroxidesupported nanorhodium catalyst LDHRh0 was employed in the Hecktype coupling of alkenes 1with arylboronic acids 2to afford the corresponding substituted alkenes 3in good to high yields Table1. The catalyst was separated by simple filtration and reused for five cycles with consistent activity. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
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4. Copper-Free Sonogashira Coupling of Acid Chlorides with Terminal Alkynes in the Presence of a Reusable Palladium Catalyst: An Improved Synthesis of 3-Iodochromenones (=3-Iodo-4H-1-benzopyran-4-ones).

Author

Pravin 4;R. Likhar, M. 4;S. Subhas, Moumita Roy, Sarabindu Roy, and M. 4;Lakshmi Kantam

Abstract

Pd/C is used as an efficient catalyst for the copper-free Sonogashira coupling of acid chlorides and terminal alkynes to afford ynones in high yields (Tables 4;1 and 3). Cyclization of (2-methoxyaryl)-substituted ynones induced by I2/ammonium cerium(IV) nitrate (CAN) at room temperature gave 3-iodochromenones (=3-iodo-4H-1-benzopyran-4-ones) in excellent yield (Table 4;4). [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF

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