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The catalyst‐controlled diversity‐oriented synthesis of spirohydroquinoline‐indandiones and 3‐methylenehydroquinoline‐indandiones from ortho‐sulfonamidophenyl‐substituted para‐quinone methides and allylidene‐indandiones is reported. The strategies utilized an organobase such as DMAP or TMG to control the reaction pathway chemoselectively, furnishing the corresponding products in 40–99% yields with...
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