Synthesis 2021; 53(15): 2702-2712
DOI: 10.1055/a-1477-4871
paper

Proline-Histidine Dipeptide: A Suitable Template for Generating Ion-Tagged Organocatalysts for the Asymmetric Aldol Reaction

Authors

  • Heena Inani

    a   Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, NH-8, Bandarsindri, Distt. Ajmer, Rajasthan 305817, India
  • Avtar Singh

    a   Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, NH-8, Bandarsindri, Distt. Ajmer, Rajasthan 305817, India
  • Meeta Bhati

    a   Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, NH-8, Bandarsindri, Distt. Ajmer, Rajasthan 305817, India
  • Kiran Kumari

    a   Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, NH-8, Bandarsindri, Distt. Ajmer, Rajasthan 305817, India
  • Alexander S. Kucherenko

    b   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
  • Sergei G. Zlotin

    b   N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
  • Srinivasan Easwar

    a   Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, NH-8, Bandarsindri, Distt. Ajmer, Rajasthan 305817, India

The work was supported by a collaborative project between the Department of Science and Technology (DST), Ministry of Science and Technology, India (Grant No. INT/RFBR/P-170) and the Russian Foundation for Basic Research (Grant No. 14-03-92701), research grant from the Science and Engineering Research Board (SERB), India (Grant No. EMR/2017/ 005350), a research grant from the Council of Scientific and Industrial Research (CSIR), India (Grant No. 02(0316)/17/EMR-II), and a DST-Fund for Improvement of S&T Infrastructure in Universities and Higher Educational Institutions (FIST) research grant to the Department of Chemistry, CURAJ [Grant No. SR/FST/CSI-257/2014 (C)]. H.I. and M.B. thank the University Grants Commission (UGC), India, and K.K. thanks CSIR, India, for research fellowships. S.E. thanks the Central University of Rajasthan for support.


Graphical Abstract

Preview

Abstract

Proline-histidine dipeptide laid the foundation for the construction of three new ion-tagged organocatalysts, utilising the imidazole moiety of histidine for generating the quaternary species. A brief comparative investigation of the catalysts in the enamine-mediated direct asymmetric aldol reaction brought out their contrasting features, particularly under aqueous conditions. The best among them was also utilised in preparing some derivatives and effecting a desymmetrisation.

Supporting Information



Publication History

Received: 12 November 2020

Accepted after revision: 08 April 2021

Accepted Manuscript online:
08 April 2021

Article published online:
18 May 2021

© 2021. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany