Synthesis 2019; 51(19): 3709-3714
DOI: 10.1055/s-0039-1690005
paper
© Georg Thieme Verlag Stuttgart · New York

Cu(OTf)2-Catalyzed Beckmann Rearrangement of Ketones Using Hydroxylamine-O-sulfonic Acid (HOSA)

Sailu Munnuri
a   Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX 75390, USA
,
Saumya Verma
b   Department of Chemistry, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, India   eMail: jawaharlj@bbau.ac.in   eMail: jatjawahar@gmail.com
,
Dinesh Chandra
b   Department of Chemistry, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, India   eMail: jawaharlj@bbau.ac.in   eMail: jatjawahar@gmail.com
,
Raghunath Reddy Anugu
a   Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX 75390, USA
,
John R. Falck
a   Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, Dallas, TX 75390, USA
,
Jawahar L. Jat
b   Department of Chemistry, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, India   eMail: jawaharlj@bbau.ac.in   eMail: jatjawahar@gmail.com
› Institutsangaben
J.L.J. thanks DST-SERB (YSS/2015/000838), UGC, New Delhi for UGC-BSR Grant (No.F.30-382/2017) and BBAU, Lucknow for infrastructure. J. R. F. received financial support from the Robert A. Welch Foundation (I-0011) and USPHS NIH (HL139793).
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Publikationsverlauf

Received: 04. Juni 2019

Accepted after revision: 27. Juni 2019

Publikationsdatum:
16. Juli 2019 (online)


Abstract

The Beckmann rearrangement (BKR) of ketones to secondary amides often requires harsh reaction conditions that limit its practicality and scope. Herein, the Cu(OTf)2-catalyzed BKR of ketones under mild reaction conditions using hydroxylamine-O-sulfonic acid (HOSA), a commercial water soluble aminating agent, is described. This method is compatible with most functional groups and directly provides the desired amides in good to excellent yields.

Supporting Information