Synthesis of 5-Acyl-3-(ethoxycarbonyl)-2-isoxazolines 2-Oxides by a Tandem Conjugate Addition-Ring Closure of Ethyl Nitroacetate with .alpha.-Bromo Enones
Enol Silyl Ethers and their Use for the Synthesis of α-Halo-α,β-unsaturated Carbonyl Compounds
作者:P. AMICE、L. BLANCO、J. M. CONIA
DOI:10.1055/s-1976-23988
日期:——
A Convenient Halogenation of α,β-Unsaturated Carbonyl Compounds with<i>OXONE</i>
<sup>®</sup>and Hydrohalic Acid (HBr, HCl)
作者:Kyoung-Mahn Kim、In-Hwan Park
DOI:10.1055/s-2004-831232
日期:——
Mixtures of OXONE ® and hydrobromic acid or hydrochloric acid afford solutions of bromine or chlorine, respectively. α-Bromo- or α-chloro-α,β-unsaturated carbonyl compounds were prepared by addition of hydrobromic acid or hydrochloric acid to the mixture of α,β-unsaturated carbonyl compounds and OXONE ® in CH2Cl2 followed by treatment of Et3N in moderate to good yields.
Synthesis of 5-Acyl-3-(ethoxycarbonyl)-2-isoxazolines 2-Oxides by a Tandem Conjugate Addition-Ring Closure of Ethyl Nitroacetate with .alpha.-Bromo Enones