An Efficient Synthesis of Dibenzocycloocta-4a,6a,-diene-5,11-diyne
and its Precursors
作者:Fred Wudl、Sterling Chaffins、Michael Brettreich
DOI:10.1055/s-2002-32542
日期:——
efficient syntheses of dibenzocyclooctadienediyne 1 were developed employing known reactions, which utilize commercially available reagents. Both methods are an improvement on known syntheses resulting in 41% and 43% overall yields. The latter method also offers an efficient synthesis of dibenzocyclooctateraene 9, which is one of the key reagents nowcommercially unavailable.
Dibenzotricycloöctadiene (I) yields on heating with dienophiles, Diels-Alderadducts (IV and V) and forms with oxygen a peroxide (VI). These reactions are explained by formation of an intermediate with an ortho-quinonoid structure (II). Polycyclic Diels-Alderadducts were obtained in good yields from a solution of benzocyclobutadiene and unstable hydrocarbons such as ortho-quinodimethane or 2,3-dihydronaphthalene
Arene synthesis by extrusion reaction. Part 14. Synthesis of benzo-fused tetraphenylenes and crystal structure of a 4:1 clathrate inclusion compound of dibenzo[b,h]tetraphenylene with p-xylene
作者:Yuet Ming Man、Thomas C. W. Mak、Henry N. C. Wong
DOI:10.1021/jo00297a043
日期:1990.5
Unsaturated eight-membered ring compounds. XI. Synthesis of sym-dibenzo-1,5-cyclooctadiene-3,7-diyne and sym-dibenzo-1,3,5-cyclooctatrien-7-yne, presumably planar conjugated eight-membered ring compounds
作者:Henry N. C. Wong、Peter J. Garratt、Franz Sondheimer
DOI:10.1021/ja00824a066
日期:1974.8
WONG H. N. C.; SONDHEIMER F., TETRAHEDRON, 1981, 37, SUPPL. NO 9, 99-109