cas 122-75-8, N,N'-Dibenzyl ethylenediamine diacetate | Articles data ｜lookchem

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Preparation method of N,N-dibenzyl ethylenediamine diacetate
The invention discloses a preparation method of N,N-dibenzyl ethylenediamine diacetate. The method comprises the following steps: S1, adding 50 parts by weight of diacetyl dibenzyl ethylenediamine material into a three-necked bottle, and adding 80-120 parts by weight of concentrated hydrochloric acid into the three-necked bottle to obtain 36.0-37.5 parts by weight of a compound B; S2, adding 200 parts by weight of water into the compound B obtained in the step S1 for fully dissolving, and dropwise adding a sodium hydroxide solution to adjust the pH value to 8-9; then, adding toluene for extracting for a plurality of times, and carrying out layered treatment to obtain an organic phase of a mixture of a compound C and the toluene; S3, adding the organic phase of the mixture of the compound Cand toluene into the three-necked bottle and distilling under the reduced pressure until no fraction is obtained, then adding ethyl acetate for dissolving, heating up to 60 DEG C, then dropwise adding 20 parts by weight of glacial acetic acid, and drying to obtain 47.0-49.0 parts by weight of dibenzyl ethylenediamine diacetate finally. The preparation method provided by the invention improves thereaction safety and reduces the reaction cost; furthermore, the yield of the dibenzyl ethylenediamine diacetate is also increased to 93% or above.
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Page/Page column 8-10

(2018/10/19)

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Chemical Properties

Appearance/Colour :white crystalline powder
Melting Point: 117-118 °C
Boiling Point: 373.8 °C at 760 mmHg
Flash Point:220.5 °C
Density: 1.028 g/cm³
Storage Temp.:Store below +30°C.
Merck: 14,1064
BRN: 3781362
PSA: 98.66000
LogP: 3.52960

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