Diatropicity of 3,4,7,8,9,10,13,14-Octadehydro[14]annulenes: A Combined Experimental and Theoretical Investigation
作者:Andrew J. Boydston、Michael M. Haley、Richard Vaughan Williams、John R. Armantrout
DOI:10.1021/jo020463i
日期:2002.12.1
increased from one to two to three. This decrease in annulenic ring current is manifested in the alkene proton chemical shifts (0-2 benzenes) as well as the NICS (0-3 benzenes). Comparison of isomeric thiophene-fused annulenes shows further evidence of ring current competition as these allow for observation of intermittent degrees of delocalization throughout the annulenic core. A consistent relationship
Double cycloaromatization of (Z,Z)-deca-3,7-diene-1,5,9-triyne: evidence for the intermediacy and diradical character of 2,6-didehydronaphthalene
作者:Kamal N. Bharucha、Rebecca M. Marsh、Robert E. Minto、Robert G. Bergman
DOI:10.1021/ja00034a059
日期:1992.4
Synthesis and investigations of enetetraynes
作者:Daniel Elbaum、Toan B. Nguyen、William L. Jorgensen、Stuart L. Schreiber
DOI:10.1016/s0040-4020(01)80631-1
日期:1994.1
Several enetetrayne containing compounds have been synthesized and their chemistry explored vis-a-vis the Bergman cycloaromatization. With one exception the compounds were unreactive along this pathway. AM1 calculations were performed in order to gain further insights into these reactions. The results indicate that the strain of constraining the resulting benzodiyne in a small ring raises the energy of the transition state of the initial Bergman reaction.
Diatropicity of Dehydrobenzo[14]annulenes: Comparative Analysis of the Bond-Fixing Ability of Benzene on the Parent 3,4,7,8,9,10,13,14-Octadehydro[14]annulene
作者:A. J. Boydston、Michael M. Haley
DOI:10.1021/ol016764g
日期:2001.11.1
[GRAPHICS]We report the synthesis of 3,4,7,8,9,10,13,14-octadehydro[14]annulene (1) and detail a comparative aromaticity study with its benzannelated derivatives (e.g., 2 and 3).
Transannular Diels-Alder route to systems related to dynemicin A
作者:John A. Porco、Frank J. Schoenen、Thomas J. Stout、Jon Clardy、Stuart L. Schreiber