Synlett 2018; 29(18): 2342-2361
DOI: 10.1055/s-0037-1609584
account
© Georg Thieme Verlag Stuttgart · New York

Design and Synthesis of Aromatics through [2+2+2] Cyclotrimerization

Sambasivarao Kotha*
a   Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India   Email: srk@chem.iitb.ac.in
,
Kakali Lahiri*
b   Department of Chemistry, V. K. Krishna Menon College of Commerce & Economics, Bhandup East, Mumbai 400042, India
,
Gaddamedi Sreevani
a   Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai 400076, India   Email: srk@chem.iitb.ac.in
› Author Affiliations
S.K. thanks the Department of Science and Technology (DST), New Delhi for the financial support (EMR/2015/002053). G.S. thanks the CSIR-New Delhi for the award of a research fellowship. S.K. thanks the DST for the award of a J. C. Bose fellowship (SR/S2/JCB-33/2010) and Praj industries for a Chair Professor (green chemistry).
Further Information

Publication History

Received: 12.02.2018

Accepted after revision: 18.06.2018

Publication Date:
08 August 2018 (online)


Abstract

The [2+2+2] cycloaddition reaction is a useful tool to realize unusual chemical transformations which are not achievable by traditional methods. Here, we report our work during the past two decades that involve utilization of transition-metal complexes in a [2+2+2] cyclotrimerization reaction. Several key “building blocks” were assembled by a [2+2+2] cycloaddition approach and they have been further expanded by other synthetic transformations to design unusual amino acids and peptides, diphenylalkanes, bis- and trisaryl benzene derivatives, annulated benzocycloalkanes, spirocycles, and spirooxindole derivatives. Furthermore, we have also discussed about alkyne surrogates, environmentally friendly, and stereoselective [2+2+2] cycloaddition reactions. Application of the [2+2+2] cycloaddition reaction in total synthesis is also covered. In this review we also included others work to give a balanced view of the recent developments in the area of [2+2+2] cycloaddition.

1 Introduction

2 Unusual Amino Acids and Peptides

3 Heteroanalogues of Indane

4 Diphenylalkane Derivatives

5 Multi-Armed Aryl Benzene Derivatives

6 Annulated Benzocycloalkanes

7 Spirocycles

8 Selectivity in [2+2+2] Cycloaddition of Alkynes

9 [2+2+2] Cycloaddition Reactions under Environmentally Friendly Conditions

10 Alkyne Surrogates

11 Domino Reactions involving a [2+2+2] Cycloaddition

12 Biologically Important Targets/Total Synthesis

13 Conclusions