Abstract
A straightforward and traceless solid-phase methodology was developed for the synthesis of isocoumarins. This two-step process involves a Sonogashira cross-coupling reaction between polymer-bound 2-bromobenzoates and terminal alkynes, followed by an electrophile-induced halocyclization of the resulting 2-(alk-1-ynyl)benzoates through activation of the triple bond with the subsequent release of the 3-substituted 4-haloisocoumarins. This polymer-bound parallel synthetic approach allowed us to achieve large diversity in good to excellent yields and purities.
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