Synthesis and Analgesic Activity of Analogs of 3-Methyl-4-Methoxycarbonyl Fentanyl

The synthesis, separation of diastereo-isomers and analgesic activities of some analogs of N-1-(2-phenylethyl)-3-methyl-4-methoxycarbonyl-4-piperidinyl-N-propionylaniline (3-methyl-4-methoxycarbonyl fentanyl) were reported. Preliminary pharmacological r