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2 article(s) from Ghosh, Pradyut

A heteroditopic macrocycle as organocatalytic nanoreactor for pyrroloacridinone synthesis in water

Piyali Sarkar,
Sayan Sarkar and
Pradyut Ghosh

Beilstein J. Org. Chem. 2019, 15, 1505–1514, doi:10.3762/bjoc.15.152

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Figure 1: Bis-amido-tris-amine macrocycle BATA-MC.

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Figure 2: (a) Number distribution plot with particle size in DLS, (b) SEM image and (c) TEM image showing the...

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Figure 3: Dependence of the yield of compound 4a on the reaction time using BATA-MC.

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Figure 4: Yields of product 4a at different catalyst loading.

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Scheme 1: BATA-MC-catalyzed synthesis of 4,5-dihydropyrrolo[2,3,4-kl]acridinones.

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Scheme 2: BATA-MC-catalyzed synthesis of pyrrolo[2,3,4-kl]acridinone derivatives.

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Figure 5: X-ray single crystal structure of 4d (CCDC 1898008).

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Scheme 3: Probable mechanism illustrated for the synthesis of 4a using BATA-MC. For the sake of simplicity, w...

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Figure 6: Representation of BATA-MC nanoreactor.

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Figure 7: The reusability of the nanoreactor for the synthesis of 4a.

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Published 08 Jul 2019

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Structural studies on encapsulation of tetrahedral and octahedral anions by a protonated octaaminocryptand cage

I. Ravikumar,
P. S. Lakshminarayanan,
E. Suresh and
Pradyut Ghosh

Beilstein J. Org. Chem. 2009, 5, No. 41, doi:10.3762/bjoc.5.41

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Figure 1: Octaaminocryptand with p-xylyl spacers L¹, with m-xylyl spacers L².

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Figure 2: ORTEP diagram of the [H₆L¹]⁶⁺ with encapsulated ClO₄⁻ (40% probability factor for the thermal ellip...

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Figure 3: (a) Mercury diagram depicting the interactions of the encapsulated ClO₄⁻ within the [H₆L¹]⁶⁺ and th...

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Figure 4: ORTEP diagram with atom numbering scheme depicting the octaprotonated L¹ with disordered HSO₄⁻ mono...

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Figure 5: Mercury diagram depicting the encapsulation of disordered hydrogen sulfate in the cavity of [H₈L¹]⁸⁺...

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Figure 6: Interactions of the protonated amino nitrogen centers of the [H₈L¹]⁸⁺ moiety with the surrounding h...

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Figure 7: ORTEP diagram depicting the octaprotonated [H₈L¹]⁸⁺ moiety with the encapsulated disordered HSiF₆⁻ ...

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Figure 8: Mercury diagram depicting the encapsulation of the disordered HSiF₆⁻ inside the [H₈L¹]⁸⁺ moiety alo...

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Figure 9: Mercury diagram depicting the interaction of the [H₈L¹]⁸⁺ with the surrounding molecules via N–H···...

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Published 31 Aug 2009

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