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US 8,865,941 B2Granted
Process for the preparation of alkyldiamines
AssigneeAngus Chemical Company
InventorsMichael D. Major, David W. Moore
Life of this patent
Estimating the term…
Abstract
Provided is a process for preparing alkyl diamine compounds in high purity. The process utilizes an alkyl amine compound during the reduction of a nitroamine, resulting in reduction of the concentration of undesired byproducts.
Claims11
A process for preparing an alkyl diamine compound of formula I:
- wherein n is an integer from 1 to 5;
- R1 and R2 are independently H or C1-C6 alkyl, or R1 and R2 together with the carbon to which they are attached form C3-C12 cycloalkyl;
- and R3 and R4 at each occurrence are independently H or C1-C6 alkyl, the process comprising reducing a corresponding nitroamine compound, wherein the reduction is conducted in the presence of an alkylamine compound of formula II:
- wherein R5 is H or C1-C6 alkyl and R6 is C1-C6 alkyl.
1 more element
A process for preparing 2-methyl-1,2-diaminopropane, the process comprising:
- hydrogenating 2-nitro-2-methyl-l-propylamine in the presence of hydrogen gas, a hydrogenation catalyst, and n-propylamine.
Dependencies are inferred from the claim text.