Abstract: This invention relates to the hydrogenation of tetrahydropyrimidines to yield linear N-substituted diamines which can be reacted with carbonyls to form imines, which imines can be reduced to N,N'-substituted diamines as illustrated by N,N'-substituted 2,4-diamino-2-substituted pentanes. The products of this invention are useful as fuel additives.

Abstract: This invention relates to substituted pyridines prepared by reacting aldehydes, amines, lower carboxylic acids such as acetic acid in the presence of oxygen. The N-substituted pyridinium salts formed can be converted to pyridines by thermal dealkylation.

Abstract: Substituted 2, 3, 4, 5-tetrahydropyridimines (THP) ##STR1## are prepared as follows: (1) The reaction of a carbonyl compound (ketone or aldehyde) with (NH.sub.3 or NH.sub.4 OH) and a sulfur-containing catalyst.(2) The reaction of an .alpha., .beta.-unsaturated ketone and a carbonyl compound and NH.sub.3 (or NH.sub.4 OH) without a catalyst.(3) Reaction of an .alpha., .beta.-unsaturated ketone, a 1-amino-alcohol and NH.sub.3 (or NH.sub.4 OH) without a catalyst.The compositions of this invention react with carbon disulfide to form xanthates, can be isomerized, converted to pyridines, etc.Thp and derivatives of this invention are useful as biocides, anti-oxidants, oxygen scavengers, corrosion inhibitors, etc.

Abstract: This invention relates to the preparation of octahydrophenanthridines by the deammoniation of tetrahydropyrimidines; and to the products thereof.

Abstract: This invention relates to a process of preparing alkylpyridines and N-substituted alkyldihydropyridines from hexahydrotriazines. These products may be further reacted to form other compositions. The products of the reaction are useful as corrosion inhibitors.

Abstract: This invention relates to the use of hexahydropyrimidines (HHP) as anti-oxidants for elastic materials such as rubber.The preferred hexahydropyrimidines contain at least one cycloalkylene or substituted cycloalkylene group and most preferably three cycloalkylene groups as illustrated by 2,2,4,4-dipentamethylene-5,6-tetramethylene hexahydropyrimidine.

Abstract: Substituted 2, 3, 4, 5-tetrahydropyrimidines (THP) ##STR1## are prepared as follows: (1) The reaction of a carbonyl compund (ketone or aldehyde) with (NH.sub.3 or NH.sub.4 OH) and a sulfur-containing catalyst.(2) The reaction of an .alpha., .beta.-unsaturated ketone and a carbonyl compound and NH.sub.3 (or NH.sub.4 OH) without a catalyst.(3) Reaction of an .alpha., .beta.-unsaturated ketone, a 1-amino-alcohol and NH.sub.3 (or NH.sub.4 OH) without a catalyst.The compositions of this invention react with carbon disulfide to form xanthates, can be isomerized, converted to pyridines, etc.

Abstract: This invention relates to hexahydropyrimidines (HHP) and to the preparation of HHP by the reduction of tetrahydropyrimidines (THP). HHP is preferably prepared by reacting carbonyls, such as ketones and aldehydes, with ammonia in the presence of ammonium formate to form THP and then reducing THP to HHP. The preferred carbonyl is a cycloalkylene ketone such as cyclohexyl ketone or substituted cyclohexyl ketone.

Abstract: This invention relates to the reductive amination of unsaturated cyclic ketones; to cyclic amines prepared thereby; and to uses thereof. For example, when isophorone is reductively aminated, trimethyl cyclohexylamines and cyclohexenamines are obtained. This invention also relates to uses thereof, for example, as fuel additives, particularly for stabilizing distillate fuels.

Abstract: This invention relates to a process of preparing alkylpyridines and N-substituted alkyldihydropyridines from hexahydrotriazines. These products may be further reacted to form other compositions. The products of the reaction are useful as corrosion inhibitors.

Abstract: This invention relates to the reductive amination of unsaturated cyclic ketones; to cyclic amines prepared thereby; and to uses thereof. For example, when isophorone is reductively aminated, trimethyl cyclohexylamines and cyclohexenamines are obtained. This invention also relates to uses thereof, for example, as fuel additives, particularly for stabilizing distillate fuels.

Abstract: Thiophosphates of the formula ##EQU1## where X is O or S, R is a hydrocarbon or a substituted hydrocarbon group such as alkyl, aryl, cycloalkyl, alkaryl, aralkyl, etc., and R' is a 3-thione-propene-1 or a substituted 3-thione-propene-1 group; the preparation thereof by reacting a 1,2-dithiolium compound with a phosphite ester; the reversion to the original dithionium compound is effected by reacting the thiophosphate under acid conditions; and the uses of such thiophosphates as corrosion inhibitors in acid systems.

Abstract: This invention relates to the oxidation of sterically hindered 1,2-dithiole-3-thiones with nitric acid to form the corresponding 1,2-dithiolium compounds. For example, when 4-neopentyl-5-tert-butyl-1,2-dithiole-3-thione is oxidized with nitric acid, 4-neopentyl 5-tert-butyl 1,2-dithiolium hydrogen sulfate is formed. When non-sterically hindered 1,2-dithiole-3-thiones are oxidized with nitric acid, decomposition rather than dithiolium formation occurs.

Abstract: Thiophosphates of the formula ##EQU1## where X is O or S, R is a hydrocarbon or a substituted hydrocarbon group such as alkyl, aryl, cycloalkyl, alkaryl, aralkyl, etc., and R' is a 3-thione-propene-1 or a substituted 3-thione-propene-1 group; the preparation thereof by reacting a 1,2-dithiolium compound with a phosphite ester; the reversion to the original dithionium compound is effected by reacting the thiophosphate under acid conditions; and the uses of such thiophosphates as corrosion inhibitors in acid systems.

Abstract: Distillate fuels containing minor amounts of hexahydropyrimidines sufficient to inhibit fuel deterioration.

Abstract: Thiophosphates of the formula ##EQU1## where X is 0 or S, R is a hydrocarbon or a substituted hydrocarbon group such as alkyl, aryl, cycloalkyl, alkaryl, aralkyl, etc., and R' is a 3-thione-propene-1 or a substituted 3-thione-propene-1 group; the preparation thereof by reacting a 1,2-dithiolium compound with a phosphite ester; the reversion to the original dithionium compound is effected by reacting the thiophosphate under acid conditions; and the uses of such thiophosphates as corrosion inhibitors in acid systems.

Abstract: A process of converting 2,3,4,5-tetrahydropyrimidines containing at least 1 hydrogen in the 2-position and at least one methylene group in the 4-position to corresponding pyridines which comprises heating said tetrahydropyrimidines to a temperature sufficiently high to remove ammonia and hydrogen so as to form said pyridines.