Trifluoroacetic acid → (1R*,2S*)-(E)-1'-methyl-2-(3-(4-(piperazin-1-yl)styryl)-1H-indazol-6-yl)spiro[cyclopropane-1,3'-indolin]-2'-one 2,2,2-trifluoroacetate

Participants

Reaction Steps

The title compound was synthesized according to the method of Example A45, except substituting (1R*,2S*)-2-(3-iodo-1H-indazol-6-yl)-1′-methylspiro[cyclopropane-1,3′-indolin]-2′-one (37 mg, 0.090 mmol) and (E)-tert-butyl 4-(4-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)vinyl)phenyl)piperazine-1-carboxylate (45 mg, 0.109 mmol). The solvent was removed and the Boc-protected amine purified by column chromatography (silica gel, CH2Cl2/MeOH, 95:5) to give an impure product which dissolved into CH2Cl2 (2.0 mL) and TFA (200 uL) was added. The reaction was stirred for 2 h, the solvent removed and the residue purified by prep-HPLC to give the title compound as an off-white powder (2.0 mg, 4.0%); 1H NMR (400 MHz, CD3OD) δ 7.97 (d, J=8.5 Hz, 1H), 7.56 (d, J=8.4 Hz, 2H), 7.46-7.41 (m, 2H), 7.30 (d, J=17 Hz, 1H), 7.15 (t, J=7.2 Hz, 1H), 7.06-6.99 (m, 4H), 6.65 (t, J=8.0 Hz, 1H), 6.02 (d, J=7.7 Hz, 1H), 3.49-3.44 (m, 4H), 3.40-3.31 (m, 8H), 2.28-2.25 (m, 1H), 2.21-2.18 (m, 1H); MS ESI [M+H]+ 476.2, calcd for [C30H29N5O+H]+ 476.25.

Provenance & Evidence