Synthesis 2019; 51(12): 2523-2531
DOI: 10.1055/s-0037-1611525
special topic
© Georg Thieme Verlag Stuttgart · New York

Ruthenium(II)-Catalyzed Migratory C–H Allylation/Hydroamination Cascade for the Synthesis of Rutaecarpine Analogues

Authors

  • Gurupada Bairy

    a   Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India   Email: rjana@iicb.res.in
    b   Academy of Scientific and Innovative Research (AcSIR), Jadavpur, Kolkata 700032, West Bengal, India
  • Arijit Nandi

    a   Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India   Email: rjana@iicb.res.in
  • Kartic Manna

    a   Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India   Email: rjana@iicb.res.in
    b   Academy of Scientific and Innovative Research (AcSIR), Jadavpur, Kolkata 700032, West Bengal, India
  • Ranjan Jana*

    a   Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, West Bengal, India   Email: rjana@iicb.res.in
    b   Academy of Scientific and Innovative Research (AcSIR), Jadavpur, Kolkata 700032, West Bengal, India

This work was financially supported by the Department of Science and Technology (DST), Science and Engineering Research Board (SERB), Government of India (Ramanujan Fellowship Award No. SR/S2/RJN-97/2012, Extra Mural Research Grant No. EMR/2014/000469). G.B. thanks UGC and K.M. thanks CSIR for their fellowships.
Further Information

Publication History

Received: 11 March 2019

Accepted after revision: 27 March 2019

Publication Date:
26 April 2019 (online)


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Published as part of the Special Topic Ruthenium in Organic Synthesis

Abstract

An unprecedented allyl migration from a remote position of a quinazoline moiety through a ruthenium(II) shuttle is reported. This present cascade reaction is initiated through the formation of an η3-ruthenium–allyl complex followed by C–H allylation at the ortho position of the 2-aryl moiety. Finally, hydroamination with the quinazolinone -NH group, which is formed through tautomerization of the quinazoline, furnishes the annulation product. This exceedingly fast cascade reaction is complete within 10 minutes to provide rutaecarpine analogues in a single operation.

Supporting Information