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Updated: Aug 20, 2026

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
Published on: February 7, 2019
Photoisomerisation of dibenzobarrelenes--a facile route to polycyclic synthons
Danaboyina Ramaiah1, Meledathu C Sajimon, Joshy Joseph
1Photosciences and Photonics Division, Regional Research Laboratory (CSIR), Trivandrum 695 019, India. d_ramaiah@rediffmail.com
Abstract:
Triplet state mediated di-pi-methane rearrangements of dibenzobarrelenes give a variety of interesting synthons, formed as primary and secondary photoproducts. These synthons could find use for the synthesis of complex synthetic targets. This tutorial review highlights the photoisomerisation of some bridgehead substituted dibenzobarrelenes and the products derived from them. Selected examples of photoisomerisations proceeding through a tri-pi-methane pathway are also included.
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