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ChemicalBook CAS DataBase List 2-Amino-1,3-propanediol
534-03-2

2-Amino-1,3-propanediol synthesis

14synthesis methods
 2-Amino-1,3-propanediol (serinol) is used in the production of Iopamidol. A process of making 2-amino-1,3-propanediol comprising:

(a) reacting 1,3-dihydroxyacetone dimer with an amine of the formula, NH2CH2alkyl, in the presence of a solvent to form an intermediate alkoxyimine; and

(b) reacting the intermediate with a reducing agent to form 2-amino-1,3-propanediol.

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Yield:534-03-2 346.27 kg

Reaction Conditions:

with hexamethylenetetramine;ammonia in water at 50 - 60; for 8 h;Large scale;

Steps:

Amination process

The 2-chloro-1,3-propanediol (420.12kg, 3.80kmol) gained in the previous step is transferred to the amination still A17 or the amination still B18, 20% ammonia water (800.00kg, 9.41kmol) and urotropine ( 15.00kg, 0.11kmol), stirred and heated to 50-60°C for 8h. After the reaction is completed, press filtration to obtain 2-amino-1,3-propanediol (346.27kg) after deamination and dehydration, which is sent for inspection by gas chromatographic analysis, and the analysis results are as follows:

References:

CN113683521,2021,A Location in patent:Paragraph 0048-0051

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