Accession Number : AD0635119
Title : HIGH-YIELD REACTIONS TO INTRODUCE ALDEHYDE GROUPS INTO PYRIDINE DERIVATIVES.
Descriptive Note : Final comprehensive rept. 10 May 65-10 May 66.
Corporate Author : ASH STEVENS INC DETROIT MICH
Personal Author(s) : DANIHER, F. A. ; Ash,A. B.
Report Date : MAY 1966
Pagination or Media Count : 61
Abstract : The mechanism of the deoxygenation of 5-ethyl-2-picoline N-oxide with benzyl sulfonyl chloride was elucidated. Two new methods for the deoxygenation of pyridine N-oxides were discovered. The sulfonyl chloride rearrangement of 2-picolin N-oxides was extended to include sulfonic acid anhydrides and sulfonyl bromides. The selective reduction of cyanopyridines to pyridinecarboxaldehydes with Raney nickel was ivestigated. The conversion of 2-pyridinemethanols to their oximes via the 2-sulfonate esters was demonstrated. The oxidation of 2-pyridine methanols to the corresponding aldehydes with manganese dioxide gave moderate yields. Oxidation of 2-pyridine methanols with t-butyl hypochloride gave the aldehyde in yields of 45 to 57%. 2-Pyridin aldoxime methochloride was prepared from 2-pyridine methanol by a new sequence involving (1) quaternization with methyl iodide, (2) conversion to the 2-chloromethyl analog with thionyl chloride and (3) reaction with hydroxylamine; the overall yield was 56%. The conversion of 4-picoline N-oxide to 4-pyridine aldoxime via anil formation, acid hydrolysis, and oxime formation was successful. (Author)
Descriptors : (*PYRIDINES, OXIDATION), (*ALDEHYDES, SYNTHESIS(CHEMISTRY)), OXIDES, REDUCTION(CHEMISTRY), NITRILES, SULFONATES, CARBINOLS, OXIMES, NITROGEN HETEROCYCLIC COMPOUNDS
Subject Categories : Organic Chemistry
Chemical, Biological and Radiological Warfare
Distribution Statement : APPROVED FOR PUBLIC RELEASE