P. Molina et al., An efficient preparation of novel ferrocenylimidazole and ferrocenyloxazolinone derivatives from beta-ferrocenylvinylheterocumulenes, TETRAHEDRON, 55(5), 1999, pp. 1417-1426
A rapid and efficient synthetic procedure has been developed to prepare new
ferrocenylimidazole derivatives bearing an oxygen or sulfur atom at the 2-
position in the imidazole ring. The method is based on the thermal heterocy
clization of beta-ferrocenylvinylcarbodiimides or related compounds such as
beta-fenocenylvinylureas or beta-ferrocenylvinylthioureas. A slight modifi
cation using TBAF as cyclizing agent allows the preparation of ferrocenylox
azolidinones. (C) 1999 Elsevier Science Ltd. All rights reserved.