Fig. 2: Substrates scope of homocoupling [2 + 2] cycloadditions. | Nature Communications

Fig. 2: Substrates scope of homocoupling [2 + 2] cycloadditions.

From: Cage-confined photocatalysis for wide-scope unusually selective [2 + 2] cycloaddition through visible-light triplet sensitization

Fig. 2

Isolated yields are shown with d.r. in parentheses determined by 1H NMR analyses. No d.r. value means excellent diastereoselectivity for the syn-HH isomer with the anti-HH isomer undetectable. The data are based on average of two runs. Substrates of a chalcone, b cinnamate, and c benzylideneacetone derivatives. LED light-emitting diode (450 nm); r.t. room temperature. The single-crystal structure of product 1 is demonstrated.

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