Organic Letters
Letter
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ASSOCIATED CONTENT
* Supporting Information
The Supporting Information is available free of charge on the
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S
Experimental details and spectral characterization of all
(8) Luo, M.; Fadeev, E. A.; Groves, J. T. Nat. Chem. Biol. 2005, 1,
149.
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(9) (a) Walz, A. J.; Mollmann, U.; Miller, M. J. Org. Biomol. Chem.
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2007, 5, 1621. (b) Juarez-Hernandez, R. E.; Franzblau, S. G.; Miller,
M. J. Org. Biomol. Chem. 2012, 10, 7584.
AUTHOR INFORMATION
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Corresponding Author
ORCID
(10) (a) Sakakura, A.; Kondo, R.; Ishihara, K. Org. Lett. 2005, 7,
1971. (b) Sakakura, A.; Umemura, S.; Kondo, R.; Ishihara, K. Adv.
Synth. Catal. 2007, 349, 551.
(11) (a) Phillips, A. J.; Uto, Y.; Wipf, P.; Reno, M. J.; Williams, D. R.
Org. Lett. 2000, 2, 1165. (b) Reddy, L. R.; Saravanan, P.; Corey, E. J.
J. Am. Chem. Soc. 2004, 126, 6230.
(12) Sharma, K. K.; Boddy, C. N. Bioorg. Med. Chem. Lett. 2007, 17,
3034.
(13) (a) Sahu, B.; Muruganantham, R.; Namboothiri, I. N. N. Eur. J.
Org. Chem. 2007, 2007, 2477. (b) Shingala, S. D.; Reddy, G. V.;
Kumar, R. S. C.; Yadav, P. A.; Babu, K. S. J. Asian Nat. Prod. Res.
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Present Address
†(A.P.) The State University of New York at Buffalo, Buffalo,
NY.
Notes
The authors declare no competing financial interest.
(14) Xu, Y.; Miller, M. J. J. Org. Chem. 1998, 63, 4314.
(16) Use of 1 equiv of DIPEA in the coupling led to E-product 28.
(17) Kaburagi, Y.; Kishi, Y. Org. Lett. 2007, 9, 723.
(18) Cobactin 34 was confirmed by HRMS and by crude H NMR
to deprotected cobactin 20.
ACKNOWLEDGMENTS
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Funding from CSIR-India and SERB-India (EMR/2016/
004298/OC) is gratefully acknowledged. C.G. thanks UGC−
India for a research fellowship. S.P. and A.P. thank IISERB for
fellowships. We thank CIF, IISERB, for the analytical data and
the Director, IISERB, for funding and the infrastructure
facilities.
1
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