NEW PATHWAYS TO PRECURSORS OF PENTALENE

Authors
YOU SC NEUENSCHWANDER M
Citation
Sc. You et M. Neuenschwander, NEW PATHWAYS TO PRECURSORS OF PENTALENE, Chimia, 50(1-2), 1996, pp. 24-26
Citations number
19
Categorie Soggetti
Chemistry
Journal title
Chimia → ACNP
ISSN journal
00094293
Volume
50
Issue
1-2
Year of publication
1996
Pages
24 - 26
Database
ISI
SICI code
0009-4293(1996)50:1-2<24:NPTPOP>2.0.ZU;2-R
Abstract
Syn-cis- (2) and anti-cis- (3) pentalene dimers are easily available b y CuCl2-induced oxidative coupling of dilithium-pentalenediide (5). On the other hand, NBS-bromination as well of 1,5-dihydro-pentalene (4) as of 1,2-dihydropentalene (6) gives unstable 1-bromo-1,2-dihydropenta lene (7), while subsequent in situ elimination with Et(3)N exclusively leads to syn-cis-pentalene dimer 2 in moderate yields.