cas 299-42-3

  1. G.Patton

    dl-Ephedrine synthesis from 1-Phenyl-1,2-propandion

    Introduction Here is described synthesis method of dl-Ephedrine from 1-Phenyl-1,2-propandion by means of catalytic reduction with hydrogen gas and Adams' catalyst. 1-Phenyl-1,2-propandion Can be purchased in international chemical market, other reagents are not so hard to buy. This is a one-pot...
  2. G.Patton

    Ephedrine extraction from plants

    Introduction Ephedrine was found in the Chinese "Ma-huang" or Ephedra sinica Stapf plant, made from various species of ephedra, by Nagai in 1887. It has two chiral centers so that four configurationally isomeric ephedrines exist. The two naturally occurring ephedrines differ in the configuration...