Synthesis 2017; 49(07): 1519-1530
DOI: 10.1055/s-0036-1588408
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© Georg Thieme Verlag Stuttgart · New York

Michael Addition of Oxindoles to N-(2-tert-Butylphenyl)maleimides: Efficient Desymmetrization for the Synthesis of Atropisomeric Succinimides with Quaternary and Tertiary Stereocenters

Authors

  • Nicola Di Iorio

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
  • Lorenzo Soprani

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
  • Simone Crotti

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
  • Emanuela Marotta

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
  • Andrea Mazzanti

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
  • Paolo Righi

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
  • Giorgio Bencivenni*

    Department of Industrial Chemistry ‘Toso Montanari’, School of Science, University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy   Email: giorgio.bencivenni2@unibo.it
Further Information

Publication History

Received: 11 January 2017

Accepted after revision: 13 January 2017

Publication Date:
08 February 2017 (online)


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Abstract

The desymmetrization of N-(2-tert-butylphenyl)maleimides was realized by means of a Michael reaction of N-(tert-butoxycarbonyl)-3-phenyloxindoles leading to the corresponding axially chiral succinimides in high yields. The use of a squaramide cinchonidine organocatalyst was fundamental to achieve the simultaneous remote control of the stereogenic axis and adjacent quaternary and tertiary stereocenters.

Supporting Information