4-Tert-Butylaniline → 2-[2-(4-Tert-butyl-phenylamino)-ethyl]-6-nitro-benzoic acid methyl ester

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Reaction Steps

To a solution of the aldehyde (Step B, 0.51 g, 2.3 mmol, 1 eq) and CH2Cl2 (30 mL) was added 4-t-butyl-aniline (0.36 mL, 2.3 mmol, 1 eq) and NaBH(OAc)3 (1.5 g, 6.8 mmol, 3.0 eq). The mixture was stirred at RT for 18 h then quenched with H2O. The mixture was extracted with EtOAc, the organic layer was washed with brine, dried (MgSO4) and concentrated in vacuo to give an orange oil. Purification by silica flash chromatography gave the desired compound as a yellow-orange foam. MS m/e 357 (M+H)+. Calc'd for C20H24N2O4-356.42.

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