Abstract
AbstractThe strained bridgehead olefins bicyclo [3.3.1]non‐1‐ene (1), bicyclo [4.2.1] non‐‐1‐(8) (2), and bicyclo [4.2.1]non‐1‐ene (3) react rapidly with 1,1‐dichloro‐2, 2‐‐difluoroethene (5) to yield mixtures of regioisomeric dichlorodifluorocyclobutanes 8/9, 10/11 and 12/13, respectively. On the contrary, the reaction of 5 with the model compound (E)‐l‐methylcyclooctene (4) is completely regioselective. The structure of the cycloadducts has been elucidated mainly by 19F‐NMR. and 13C‐NMR. spectroscopy.
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