H. Sashida et al., 1-BIENZOSTANNEPINES - FIRST SYNTHESIS AND NOVEL CONVERSION INTO 1-BENZO-BOREPINES, 1-BENZO-STIBEPINES AND 1-BENZO-TELLUREPINES, Chemical communications, (7), 1998, pp. 767-768
2-Alkyl-1-benzostannepines 3 were prepared in one pot from (Z)-1-(o-br
omophenyl)but-1-en-3-ynes 1 via tin hydride intermediates 2 and easily
converted into 1-benzo-borepines 4 and 5, -stibepines 6, 7 and 8, and
-tellurepines 9 by tin-metal exchange reaction in moderate to good yi
elds.