Synthesis and reactions of the first cyclopentadienyl isonitriles
作者:Klaus Banert、Frank Köhler、Barbara Meier
DOI:10.1016/s0040-4039(03)00784-6
日期:2003.5
6-Azidofulvenes without a further substituent in the exocyclic position were transformed into new 1-isocyano- and 2-isocyanocyclopenta-1,3-dienes by photolysis in methanol. These novel functionalized cyclopentadienes are useful building blocks, e.g. as dienes in Diels-Alder reactions. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of 1-Azaspiro[2.4]hepta-1,4,6-trienes and Azaspiroconjugation Studied by Photoelectron Spectroscopy
1-Azaspiro[2.4]hepta-1,4,6-trienes 3a-c have been prepared by photolysis or thermolysis of 6-azidofulvenes 5a-c, which were accessible by nucleophilic substitution reactions of the precursors 4a,b or by nucleophilic addition of hydrazoicacid to ethenylidene-cyclopentadiene (6c). The UV photoelectron spectrum of 2-methyl-1-azaspiro[2.4]hepta-1,4,6-triene (3c) has been recorded and analyzed by making