3-F-alkyl-4-ethoxycarbonylfuranes have been prepared from 2-F-alkyl-3-ethoxycarbonyl-7-oxa-(2,2,1)-bicyclo hepta-2,5-dienes by retro Diels-Alder reactions with tetracyclone (2,3,4,5-tetraphenylcyclopentadienone).The products were characterised by elemental analysis, NMR H-1 and F-19, and Mass Spectrometry.
Synthese d'heterocycles F-alkyles par reaction de Diels-Alder sur les F-alkyl propynoates.
摘要:
Diels-Alder reactions of Ethyl F-alkyl propynoates with different substituted furans and pyrroles were realised.Different products were obtained according to the substituents of the heterocyclic dienes and more surprisingly with the length of the F-alkyl chain.