Synlett 2020; 31(16): 1587-1592
DOI: 10.1055/s-0040-1707909
letter
© Georg Thieme Verlag Stuttgart · New York

DBU-Catalyzed Rearrangement of Secondary Propargylic Alcohols: An Efficient and Cost-Effective Route to Chalcone Derivatives

Authors

  • Rimpa De

    a   Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur P.O.-Botanic Garden, Howrah-711 103 (WB), India
  • Antony Savarimuthu

    b   Department of Chemistry, St. Xavier’s College (Autonomous), Palayamkottai, Tamil Nadu-627 002, India
  • Tamal Ballav

    a   Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur P.O.-Botanic Garden, Howrah-711 103 (WB), India
  • Pijush Singh

    a   Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur P.O.-Botanic Garden, Howrah-711 103 (WB), India
  • Jayanta Nanda

    a   Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur P.O.-Botanic Garden, Howrah-711 103 (WB), India
  • Avantika Hasija

    c   Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhauri, Bhopal-462066, India   Email: mrinalkbera26@gmail.com
  • Deepak Chopra

    c   Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhauri, Bhopal-462066, India   Email: mrinalkbera26@gmail.com
  • Mrinal K. Bera

    a   Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur P.O.-Botanic Garden, Howrah-711 103 (WB), India

Financial support from CSIR New Delhi [Grant No: 02(0270)/16/EMR-II] is most gratefully acknowledged.
Further Information

Publication History

Received: 06 May 2020

Accepted after revision: 22 June 2020

Publication Date:
24 July 2020 (online)


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Abstract

A 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-catalyzed rearrangement of diarylated secondary propargylic alcohols to give α,β-unsaturated carbonyl compounds has been developed. The typical 1,3-transposition of oxy functionality, characteristic of Mayer–Schuster rearrangements, is not observed in this case. A broad substrate scope, functional-group tolerance, operational simplicity, complete atom economy, and excellent yields are among the prominent features of the reaction. Additionally, the photophysical properties and crystal-structure-packing behavior of selected compounds were investigated and found to be of interest.

Supporting Information