Reaction of Phenylurea and N-Trimethylsilyl-N'-phenylurea with Vanadocene and N-Bromosuccinimide

摘要

Phenylurea and N-trimethylsilyl-N'-phenylurea react with vanadocene (Cp_2V) in toluene to give N-(eta~5-cyclopentadienyl)vanadio-N'-phenylurea as a major product and Cp_2VN=C=O and aniline as by-products.The reaction of N-trimethylsilyl-N'-phenylurea with N-bromosuccinimide in THF products,instead of expected N-phenylureidosuccinimide and bromotrimethylsilane,succinimide and N-(p-bromophenyl)-N-trimethylsilylurea which hydrolyzes to form (p-bromophenyl)urea.