Amalia Levy, I. Agranat
Aug 5, 2000
Citations
0
Influential Citations
7
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Reductive dimerizations of 9 H -selenoxanthen-9-one ( 3 ) and 9 H -telluroxanthen-9-one ( 4 ) (1:1) with zinc in boiling AcOH and HCl for 1 hour gave the bistricyclic ethanes 9,9′-bi(9 H -selenoxanthene ( 10 ), 9,9′-bi(9 H -telluroxanthene) ( 11 ) and 9-(9′ H -telluroxanthen-9′-yl)-9 H -selenoxanthene ( 12 ) in the ratios 21 ( 10 ):35 ( 11 ):44 ( 12 ) (in addition to 9 H -selenoxanthene ( 13 ) and 9 H -telluroxanthene ( 14 )). Analogous reactions of 4 and 9 H -thioxanthen-9-one ( 9 ) (1:1) and 3 and 9 (1:1) gave the corresponding bistricyclic ethanes. The reactions were chalcogen selective with a preference towards the tellurium-bridged bistricyclic ethanes.