Is it possible to synthesize EGTA?

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Bojidarka B. Ivanova

Mr/Miss/Mrs Hani,

Yes, it is!

Please find as attachment a possible synthetic scheme, involving relatively simple precursors and operation steps (attachment). The references are shown below:

Ref. [1] Conditions: sodium hydroxide;

Geigy A. Patent: US2709178 (1951)

Ref. [2a] Novartis AG; Patent: US6399071 B1 (2002)

Conditions: Pt on charcoal in tetrahydrofuran

Experimental details: To a solution of diazide (14.67 g) in THF (100 ml) 1.5 g is added 5 % Pt on charcoal, followed after by stirring (t = 12 h) under hydrogen.

[2b] Coonditions: in N,N-dimethyl-formamide; T = 110°C; h = 2 h; Yinglin; T.; Hongwen; X. Synthetic Commun. 21 (1991) 79-84

[2c] Conditions: water

(bei der elektrochemischen Reduktion unter Verwendung von Magnetit Kathoden)

Lech-Chemie Gersthofen, Patent: DE848807 (1942) DRP/DRBP Org.Chem.

[2d] Conditions: water; palladium, hydrogenation

Hooker Chem. Corp. Patent: US2863917 (1954) and

Knapsack-Griesheim A.G. Patent: US2671803 (1952)

Attachemnt