Acknowledgment.-The author is indebted to stitutes. These were all derived from the ... Hantzsch pyridine synthesis employing aromatic aldehydes containing basic salt-forming groups or containing other substituents readily convert- ible to salt-forming groups. TUCKAHOE 7, NEW YORK RECEIVED MAY 16, 1949 ... Mr. Samuel W. Blackman for the microanalytical results reported here. Summary A series of quaternary ammonium salts has been made for examination as potential ...