1. Synthesis of 1-hydroxyxanthines
2. Conversion of Carboxylic Acids to Amines and Their Derivatives1
3. Melting points were determined on a Mel-Temp apparatus, Microanalyses were performed by Dr. Kurt Eder, Geneva, Switzerland, Micro-Tech Laboratories, Inc., Skokie, Illinois and those for nitrogen by Mr. Leo Horner, using the Coleman Nitrogen Analyzer, Model 29. Nuclear magnetic resonance (n. m. r.) spectra were determined on a Varian A - 60 spectrometer using tetramethylsilane (TMS) as internal standard and resonances are reported in parts per million (δ) downfield from TMS from 0 to 16.6 δ. Infrared spectra were recorded on the Perkin Elmer 337 spectrophotometer and ultraviolet spectra on the Beckman DK-1 recording spectrophotometer.