1-Hydroxybenzotriazole → HCID 19610530, compound

Participants

Reaction Steps

In a similar manner to Example 9, starting material step (b), the product of step (a) (440 mg), 10% Pd on C (100 mg) and methanol (40 ml) were hydrogenolysed. A mixture of the oily residue so obtained, the product of Example 2, starting material step (c) (470 mg), HBTU (460 mg), HOBT (190 mg), diisopropylethylamine (0.63 ml) and DMF (3 ml) was reacted to give a residue which was purified by column chromatography on silica, eluting with ethyl acetate/hexane, 3:2, to give t-butyl 4-[2-methyl-3-(4-t-butoxycarbonylaminomethylbenzoyl)-carbazoyl]-2-(t-butoxycarbonylmethoxy)phenoxyacetate (380 mg) as a glass; NMR (DMSO-d6) 1.33 (9H, s), 1.38 (9H, s), 1.43 (9H, s), 3.20 (3H, s), 4.13 (2H, d), 4.59 (2H, s), 4.67 (2H, s), 6.83 (1H, d), 7.13 (2H, m), 7.28 (2H, d), 7.62 (2H, d), 7.40 (1H, t), 10.98 (1H, s); Mass Spectrum m/Z 666 (M+Na)+.

Provenance & Evidence