A Practical Synthesis of β-Keto Phosphonates from Triethyl Phosphonoacetate
摘要:
An efficient and practical preparation of beta-keto phosphonates, via acylation reaction of triethyl phosphonoacetate with carboxylic acid chlorides in the presence of magnesium chloride-triethylamine followed by decarbethoxylation, is described.
Acylations of the magnesium enolate derivatives of trimethyl and triethylphosphonoacetates, using a magnesium chloride-triethylamine system, lead to 2-acylphosphonoacetates which are decarbalkoxylated to give beta-keto phosphonates.