A series of proaromatic electron acceptors derived from fulvenes were synthesized from tetrachlorocyclopentadiene and previously unknown 1,4-dicyano- and 1,4-dialkoxycarbonyl-2,3-dimethoxy cyclopentadienes. Two reversible one-electron reductions steps observed for fulvalenes coalesce into one two-electron reduction step upon increasing the length of the conjugating bridge. (C) 2003 Elsevier Ltd. All rights reserved.
NEUNHOEFFER, HANS;DIEHL, WERNER;KARAFIAT, UTE, LIEBIGS ANN. CHEM.,(1989) N, C. 105-110
作者:NEUNHOEFFER, HANS、DIEHL, WERNER、KARAFIAT, UTE
DOI:——
日期:——
METZ, H. -J.;NEUNHOEFFER, H., CHEM. BER., 1982, 115, N 8, 2807-2818
作者:METZ, H. -J.、NEUNHOEFFER, H.
DOI:——
日期:——
Derivatives of Alkyl 2-Hydroxy-3-oxocyclopent-1-enecarboxylates and Intermolecular [4+2] Cycloadditions of Cyclopentadienones Prepared Therefrom
作者:Michael Harmata、Aswin Garimalla
DOI:10.1055/s-0037-1610184
日期:2018.11
progenitors of cyclopentadienones for intermolecular [4+2]-cycloaddition reactions has been evaluated. It was found that the derivative containing a phosphate ester leaving group gave better yields in the cycloaddition reaction among the derivatives studied. The yields of the cycloaddition reactions were moderate, perhaps due side reactions not leading to the reactive intermediate cyclopentadienone. Some derivatives