Synthesis of 5-methoxylated 3-pyrrolin-2-ones via the rearrangement of chlorinated pyrrolidin-2-ones
摘要:
The reaction of N-substituted 4-methyl-2-pyrrolidinones or 4-diethoxyphosphoryl analogues, carrying at least two chlorine atoms between the C(3) and C(6) carbons, with alkaline methoxide in methanol afforded the corresponding 5-methoxylated 3-pyrrolin-2-ones, useful adducts for the preparation of agrochemicals or medicinal compounds. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of β-aminovinylphosphonates by organocatalytic nucleophilic displacement of acetate with amines
作者:Cécile Garzon、Mireille Attolini、Michel Maffei
DOI:10.1016/j.tetlet.2010.05.050
日期:2010.7
The synthesis of diethyl beta-aminovinylphosphonates 2 from acetoxy phosphonate 1 is described. The reaction entails an organocatalyzed substitution of the acetoxy group by primary or secondary amines. The use of a catalytic amount of DABCO is necessary if the amine is not nucleophilic enough, otherwise a strong nucleophilic amine can react without organocatalyst. The reaction led to a series of functionalized title compounds in good to excellent yields. (C) 2010 Elsevier Ltd. All rights reserved.