An alternative general preparation of 2-alkyl-1-benzostannepines and their conversion into 1-benzostibepines and 1-benzoborepines via a tin–metal exchange †
1-Benzostannepines: first synthesis and novel conversion into 1-benzo-borepines, -stibepines and -tellurepines
作者:Haruki Sashida
DOI:10.1039/a708739j
日期:——
2-Alkyl-1-benzostannepines 3 were prepared in one pot from (Z)-1-(o-bromophenyl)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 yields.
An alternative general preparation of 2-alkyl-1-benzostannepines and their conversion into 1-benzostibepines and 1-benzoborepines via a tin–metal exchange †
作者:Haruki Sashida、Atsuhiro Kuroda
DOI:10.1039/b000900h
日期:——
The 2-alkyl-1-benzostannepines 4aâg were prepared by the intramolecular hydrostannation of the tin intermediates 3 to an acetylenic moiety in one pot from (Z)-1-(o-bromophenyl)but-1-en-3-ynes 1. The obtained stannepines 4 were easily converted into the 1-benzostibepines 9, 10, 11, 12 and the 1-benzoborepines 14, 15 by tinâantimony and tinâboron exchange reactions in moderate to good yields, respectively. The 1-benzoborepines 14 and 15 are hitherto unknown heterocyclic ring systems.