Synthesis 2019; 51(03): 747-756
DOI: 10.1055/s-0037-1611056
paper
© Georg Thieme Verlag Stuttgart · New York

N-Oxide-Controlled Chemoselective Reduction of Nitrofuroxans

a   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation   Email: fershtat@bk.ru
,
Dmitry M. Bystrov
a   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation   Email: fershtat@bk.ru
b   Department of Chemistry, Moscow State University, 119991 Moscow, Leninskie Gory 1-3, Russian Federation
,
Egor S. Zhilin
a   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation   Email: fershtat@bk.ru
b   Department of Chemistry, Moscow State University, 119991 Moscow, Leninskie Gory 1-3, Russian Federation
,
Nina N. Makhova
a   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation   Email: fershtat@bk.ru
› Author Affiliations
This work was supported by the Russian Foundation for Basic Research (project 18-03-00332) and the Russian President’s Council for Grants (project MK-1302.2017.3).
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Publication History

Received: 07 July 2018

Accepted after revision: 31 August 2018

Publication Date:
21 September 2018 (online)


Abstract

A facile and chemoselective SnCl2-mediated mild reduction of regioisomeric 3- and 4-nitrofuroxans for the synthesis of amino­furazans and aminofuroxans in good yields is developed. Reduction of 4-nitrofuroxans results in the selective formation of 4-aminofuroxans, while analogous reduction of 3-nitrofuroxans affords 3-aminofurazans as a result of simultaneous reduction of the nitro group and exocyclic N–O bond.

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