Add time:08/14/2019         Source:sciencedirect.com

A new type of polymer-supported amine, p-benzyloxybenzylamine (BOBA) resin, has been developed. BOBA resin is readily prepared from Merrifield's resin in two steps. Polymer-supported imines prepared from aldehydes and BOBA resin reacted with silyl enolates in the presence of a catalytic amount of Yb(OTf)3 to afford the corresponding adducts. Cleavage from the polymer support was carried out using TMSOTf or DDQ to give different types of products in good yields.

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