Angewandte Chemie International Edition
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Inside Cover: Reduction of Phenyl Silyl Acetylenes with Lithium: Unexpected Formation of a Dilithium Dibenzopentalenide (Angew. Chem. Int. Ed. 9/2007)
Reduction of phenyl silyl acetylenes with lithium led to the unexpected formation of a dilithium dibenzopentalenide derivative together with the expected 1,4-dilithio-1,3-butadiene. The bulkiness of the silyl substituent of the phenyl silyl acetylene strongly affects its reduction mode. Further details may be found in the Communication by M. Saito and co-workers on page 1504 ff.