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. Author manuscript; available in PMC: 2015 May 19.
Published in final edited form as: Angew Chem Int Ed Engl. 2014 Apr 25;53(21):5248–5260. doi: 10.1002/anie.201309494

Scheme 18.

Scheme 18

Investigation of IMDA Bicyclizations with Acylcyclopentenes 104 and 111. TBSOTf = tert-butyldimethylsilyl trifluoromethanesulfonate, PPTS = pyridinium p-toluenesulfonate, HBPin = pinacolborane (4,4,5,5-tetramethyl-1,3,2-dioxaborolane), cod = 1,5-cyclooctadiene, PCy3 = tricyclohexylphosphine, DMAP = 4-(dimethylamino)pyridine, DMDO = dimethyldioxirane, TBAF = tetrabutylammonium fluoride.