HCID 66822143, compound → (2-(2-(2-(4-(1-Aminobutyl)phenoxy)ethoxy)ethoxy)ethyl)imidodicarbonic acid, 1,3-bis-tert-butyl ester

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The title compound was prepared by using a similar procedure as described for the preparation of 25 except that (2-(2-(2-(4-butyrylphenoxy)ethoxy)ethoxy)ethyl)imidodicarbonic acid, 1,3-bis-tert-butyl ester (44) was used instead of 1-(4-(2-(diethylamino)ethoxy)phenyl)butan-1-one (21). This produced the crude product which was purified by flash silica gel column chromatography, eluting with ethyl acetate, to give 45 (730 mg, 73%) as a clear oil: MS (ES+) m/z 497.3 (M+H)+.

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