Synlett 2017; 28(01): 133-137
DOI: 10.1055/s-0036-1588072
letter
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Thia-Analogues of Calothrixin B Involving FeCl3-Mediated Domino Reaction

Bose Muthu Ramalingam
a   Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 Tamil Nadu, India   eMail: mohanakrishnan@unom.ac.in   eMail: mohan_67@hotmail.com
,
Nachiappan Dhatchana Moorthy
b   Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600 Tamil Nadu, India
,
Elangovan Vellaichamy
b   Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600 Tamil Nadu, India
,
Arasambattu K. Mohanakrishnan*
a   Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai-600 Tamil Nadu, India   eMail: mohanakrishnan@unom.ac.in   eMail: mohan_67@hotmail.com
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Publikationsverlauf

Received: 05. August 2016

Accepted after revision: 27. August 2016

Publikationsdatum:
12. September 2016 (online)


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Abstract

The total synthesis of thiacalothrixins, an isostere of the biologically important carbazoloquinone alkaloid calothrixin B, was achieved from ethyl benzo[b]thiophene-2-carboxylate. Alternatively, the multi-step synthesis of thiaisocalothrixins could be achieved from 3-methylbenzo[b]thiophene. A preliminary in vitro cytotoxicity evaluation of the synthesized thia analogues of calothrixins displayed promising potential against cancer cell cultures.

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