The synthesis and characterization of 1-formyl-2-acylcyclopentadienylthallium compounds
摘要:
The reaction of sodium cyclopentadienide with RCOOEt (R = Me, Ph, 2-thienyl, or OEt) or Bu'COCl followed by Vilsmeier reagent in the presence of excess sodium methoxide produces the 2-substituted-6-dimethylaminofulvenes la-C in modest yields. Basic hydrolysis results in the formation of 2-substituted-6-hydroxyfulvenes 2a-e in very good yields, Subsequent deprotonation with TlOEt yields the 1-formyl-2-acyl or carboethoxy cyclopentadienylthallium compounds 3a-e. (C) 2002 Elsevier Science B.V. All rights reserved.