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Beilstein J. Org. Chem. 2012, 8, 1338–1343, doi:10.3762/bjoc.8.153
Graphical Abstract
Scheme 1: Cycloisomerization/nucleophilic addition of alkynyl benzaldehyde 1 to isochromene 2.
Figure 1: Reaction screen with diynyl benzaldehyde 3.
Scheme 2: Sequential cycloisomerizations of substrate 3. Condition A: PtCl2 (10 mol %), Cu(MeCN)4PF6 (10 mol ...
Figure 2: X-ray crystal structure of cyclopropane 6.
Scheme 3: Proposed reaction pathway for diastereoselective, sequential cycloisomerization.
Scheme 4: Proposed alternative reaction pathway affording 23.