Stereoselective Intermolecular [2+2] photocycloaddition reactions of tetrahydrophthalic anhydride and derivatives with alkenols and alkynols

Add time:08/22/2019    Source:sciencedirect.com

Intermolecular [2+2] photocycloaddition of a variety of alken- and alkyn-3-ols with 3,4,5,6-tetrahydrophthalic anhydride (THPA) and the related imide (THPI) gave the corresponding cyclobutanes and cyclobutenes in high yield. Irradiation times were relatively short and stereoselectivities as high as 101 for the cyclobutane examples.

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