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)

Authors

  • 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

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).
Weitere Informationen

Publikationsverlauf

Received: 04. Juni 2019

Accepted after revision: 27. Juni 2019

Publikationsdatum:
16. Juli 2019 (online)


Graphical Abstract

Preview

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