Substituted benzocyclobutenes, indans, and tetralins via cobalt-catalyzed cooligomerization of .alpha.,.omega.-diynes with substituted acetylenes. Formation and synthetic utility of trimethylsilylated benzocycloalkenes
A New Phototransformation of Methoxycarbonyl-Substituted (E,Z,E)-1,3,5-Hexatrienes: Easy Access to Ring-Annelated 8-Oxabicyclo[3.2.1]octa-2,6-diene Derivatives
作者:Regina von Essen、Paultheo von Zezschwitz、Denis Vidović、Armin de Meijere
DOI:10.1002/chem.200400238
日期:2004.9.6
the oxabicyclo[3.2.1]octa-2,6-diene 17 b by a formal intramolecular hetero-Diels-Alder reaction was observed and 17 b could be isolated in up to 69 % yield. To explore the scope of this new photochemical reaction, the new ring-attached (E,Z,E)-hexatrienes 4 a, 5 a and 6 b were synthesized by twofoldHeckreactions from 1,2-dibromocycloalkenes 1-3 (59-66 %). While irridiation of the cyclopentene-attached
Substituted benzocyclobutenes, indans, and tetralins via cobalt-catalyzed cooligomerization of .alpha.,.omega.-diynes with substituted acetylenes. Formation and synthetic utility of trimethylsilylated benzocycloalkenes
作者:R. L. Hillard、K. Peter C. Vollhardt
DOI:10.1021/ja00454a026
日期:1977.6
HILLARD III R. L.; VOLLHARDT K. P. C., ANGEW. CHEM. <ANCE-AD>, 1975, 87, NO 20, 744-745