Issue 32, 2019

Photodriven solid-state multiple [2 + 2] cycloaddition strategies for the construction of polycyclobutane derivatives

Abstract

Solid-state multiple [2 + 2] cycloaddition reactions of polyenes continue to attract attention as a mediate for the synthesis of polycyclobutane derivatives. The solid and crystalline states of polyenes restrict molecular movements of C[double bond, length as m-dash]C bonds and, as a result, contribute to the selective formation of polycyclobutane derivatives through photochemical [2 + 2] cycloaddition reactions. In this review, functionalised polyenes preorganised by suitable templates, such as muconate and 4-pyr-poly-2-ene (ppene) derivatives, are summarised and their multiple [2 + 2] cycloaddition reactions are described, which lead to the generation of polycyclobutane derivatives in the solid state. Single-crystal-to-single-crystal (SCSC) transformations in which the single-crystal character is preserved along the reaction sequence are emphasised, as they provide unambiguous information regarding the structural changes during the reaction.

Graphical abstract: Photodriven solid-state multiple [2 + 2] cycloaddition strategies for the construction of polycyclobutane derivatives

Article information

Article type
Highlight
Submitted
23 iyn 2019
Accepted
22 iyl 2019
First published
22 iyl 2019

CrystEngComm, 2019,21, 4673-4683

Photodriven solid-state multiple [2 + 2] cycloaddition strategies for the construction of polycyclobutane derivatives

J. Yu, M. Gan, S. Bai and Y. Han, CrystEngComm, 2019, 21, 4673 DOI: 10.1039/C9CE00971J

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