85600-01-7

Upstream product

• 18871-66-4 N,N-dimethylacetamide dimethyl acetal 
• 109-73-9 N-butylamine 
• 1119-49-9 N-butylacetamide 
• 79-44-7 N,N-Dimethylcarbamoyl chloride 

Downstream Products

• 13515-65-6 thioisobutyramide 
• 592-82-5 butyl isothiocyanate 

Relevant academic research and scientific papers

A Synthesis of acetamidines

The condensation of primary amine with N,N-dimethylacetamide dimethyl acetal yields amixture of acetamidine and imidate ester. The product distribution in this reaction depends on the temperature, solvent, and structure of the primary amine. It is possible to suppress the formation of imidate ester by performing the reaction in the presence of excess dimethyl amine, yielding acetamidine as the exclusive product. For acetamidines that cannot be purified either by crystallization or distillation, this new method is necessary for the generation of pure acetamidines in good yields.

Novel and efficient one-pot synthesis of N'-alkyl-N,N-dimethylacetamidines

An efficient method for the synthesis of N'-alkyl-N,N-dimethylacetamidine derivatives under mild conditions and in excellent yields involved reacting primary alkylamines with N,N-dimethylacetamide in the presence of LiCl as a catalyst and methanol as the acetalising reagent.

REVERSIBLE ROOM-TEMPERATURE IONIC LIQUIDS

One aspect of the present invention relates to salts that are room-temperature ionic liquids (RTILs), methods of making them, and methods of using them in connection with temporary or permanent gas sequestration. Another aspect of the present invention relates to a class of solvents which can be transformed into RTILs by exposure to a gas, and methods of using them in connection with temporary or permanent gas sequestration.

REVERSIBLY SWITCHABLE SURFACTANTS AND METHODS OF USE THEREOF

Reversible switchable surfactants are provided. A surfactant is the salt of an amidine or guanidine having at least one R group that is a hydrophobic moiety selected from the group consisting of higher aliphatic moiety, higher siloxyl moiety, higher aliphatic/siloxyl moiety, aliphatic/aryl moiety, siloxyl/aryl moiety, and aliphatic/siloxyl/aryl moiety. The other R groups are smaller moieties such as H1 C1 to C4 aliphatic or the like. The surfactant is turned on by a gas that liberates hydrogen ions, such as, for example, carbon dioxide, which liberates hydrogen ions in the presence of water. The surfactant is turned off by exposure to a flushing gas and/or heating. When "on" the surfactants are useful to stabilize emulsions, and when "off' they are useful to separate immiscible liquids or a liquid and a solid. The surfactants find uses in polymerization and in the oil industry.

AMIDINES. PART 13. INFLUENCE OF SUBSTITUTION AT IMINO NITROGEN ATOM ON pKa VALUES OF N1N1-DIMETHYLACETAMIDINES

20 N1N1-Dimethylacetamidines containing alkyl, aralkyl, or substituted phenyl groups have been synthesized, and their pKa values in 95.6percent ethanol (azeotrope) measured.The pKa values obtained were correlated with Hammett ? constants.The applicability of various ? values is discussed, and it is shown that for substituents at nitrogen ?o values should be used.It has also been shown that the pKa values of amidines correlate well with the pKa values of corresponding primary amines, and that this correlation can serve for the prediction of the pKa of amidine.Comparison of the correlations for N1N1-dimethylacetamidines with those for N1N1-dimethylformamidines indicate that sensitivity of the amidine group to substitution at the imino nitrogen atom depends to a considerable degree on substitution at a functional carbon atom.