Sarbu LG, Hopf H, Jones PG, Birsa LM. Selenium halide-induced bridge formation in [2.2]paracyclophanes.
Beilstein J Org Chem 2014;
10:2550-5. [PMID:
25383126 PMCID:
PMC4222412 DOI:
10.3762/bjoc.10.266]
[Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Accepted: 10/17/2014] [Indexed: 11/23/2022] Open
Abstract
An addition/elimination sequence of selenium halides to pseudo-geminally bis(acetylene) substituted [2.2]paracyclophanes leads to new bridges with an endo-exo-diene substructure. The reactions have been found to be sensitive to the substitution of the ethynyl group. The formation of dienes with a zig-zag configuration is related to that observed for non-conjugated cyclic diynes of medium ring size.
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