A Polymer-Supported Distannane as Photochemical, Regenerable Source of Stannyl Radicals for Organic Synthesis

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Abstract
A polystyrene-supported distannane has been developed where both tin atoms are bound to the polymer. It provides, with longlived triplet sensitizers, a smooth photochemical source of stannyl radicals that allows slow radical reactions like cyclizations or other additions, and can be applied without or with selectively adjusted H-donors. The work up is done simply by filtering off the polymer which can be regenerated for multiple use.

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