Structure of VH032 thiol
CAS No.: 2098836-54-3
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
Synonyms: VHL ligand 6
4.5
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| CAS No. : | 2098836-54-3 |
| Formula : | C23H30N4O4S2 |
| M.W : | 490.64 |
| SMILES Code : | O=C(NCC1=CC=C(C2=C(C)N=CS2)C=C1)[C@H]3N(C([C@H](C(C)(S)C)NC(C)=O)=O)C[C@H](O)C3 |
| Synonyms : |
VHL ligand 6
|
| English Name : | (2S,4R)-1-((R)-2-Acetamido-3-mercapto-3-methylbutanoyl)-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 79% | With triisopropylsilane; trifluoroacetic acid In dichloromethane at 20℃; for 2h; | (2R,3R,4S)-1 -((R)-2-acetamido-3-mercapto-3-methylbutanoyl)-3-fluoro-4-hydroxy-N-(4-(4-methylthiazol-5-yl)benzyl)pyrrolidine-2-carboxamide (23) General procedure: Compound 22 (30 mg, 0.04 mmol) was dissolved in 1.8 mL of DCM. TIPS (0.1 mL) and TFA (0.1 mL) were added, and the yellow mixture was let to react at room temperature for 2 h. HPLC analysis (acidic method) showed complete conversion of the starting material. Volatiles were removed and the crude wasdissolved in MeOH, filtered and purified by preparative HPLC and freeze-dried to give pure deprotected compound as white solid (16 mg, 79% yield). MS analysis: C23H29FN40452 expected 508.2, found 509.2 [M+Hj.‘H NMR (500 MHz, MeOD) : 8.88 (s, 1H), 8.84 (t, J6.0 Hz, OH), 8.14 (d, J=8.9 Hz, 1H), 7.47 - 7.42 (m, 4H), 5.05 - 4.92 (m, 1H), 4.91 (d, J=8.8 Hz, 1H), 4.65 (dd, J=2.5, 21.5 Hz, 1H), 4.57 - 4.37 (m, 3H), 4.29 (dd, J=6.4, 10.3 Hz, 1H), 3.75 - 3.70 (m, 1H), 2.49 (s, 3H), 2.03 (s, 3H), 1.43 (s, 3H), 1.40 (s, 3H).19FNMR: -199.94 13CNMR: 173.3, 171.5, 170.5, 153.0, 149.2, 140.0, 133.4, 131.8, 130.5, 129.1,95.3, 93.8, 71.1, 70.9, 66.2, 66.0, 59.4, 52.2, 46.8, 43.9, 29.8, 28.8. |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 2 steps 1: hydrogenchloride / dichloromethane; 1,4-dioxane / 2 h / 25 °C / Inert atmosphere 2: triethylamine / dichloromethane / 0.5 h / 0 °C | ||
| Multi-step reaction with 2 steps 1: hydrogenchloride / 1,4-dioxane; dichloromethane / 2 h / 25 °C / Inert atmosphere 2: triethylamine / dichloromethane / 0.5 h / 0 °C |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 80.65% | With triethylamine In dichloromethane at 0℃; for 0.5h; | C-14.C. Step 3 C. Step 3 To a mixture of (2S, 4R)-1-[(2R)-2-amino-3-methyl-3-sulfanyl-butanoyl]-4-hydroxy-N-[[4-(4-methylthiazol-5-yl)phenyl]methyl]pyrrolidine-2-carboxamide (1.9 g, 3.92 mmol, HCl salt) and Et3N (792.73 mg, 7.83 mmol, 1.09 mL) in CH2Cl2 (20 mL) was added Ac2O (399.89 mg, 3.92 mmol, 367.88 uL, ) at 0 °C. The mixture was stirred at 0 °C for 0.5 hour. The reaction mixture was diluted with water (20 mL). The mixture was extracted with Dichloromethane (25 mL x 3). The combined organic phase was washed with brine (30 mL), dried with anhydrous Na2SO4, filtered and concentrated in vacuo. The residue was purified by column chromatography on silica gel (Dichloromethane/Methanol = 20/1) to afford the desired product (2S,4R)-1-[(2R)-2-acetamido-3-methyl-3-sulfanyl-butanoyl]-4-hydroxy-N-[[4-(4-methylthiazol-5-yl)phenyl]methyl]pyrrolidine-2-carboxamide (1.55 g, 3.16 mmol, 80.65% yield).1H NMR: DMSO-d6, 400 MHz. δ 8.98 (s, 1H), 8.61 (t, J = 6.0 Hz, 1H), 8.13 (d, J = 9.6 Hz, 1H), 7.44 -7.37 (m, 4H), 5.28 - 5.08 (m, 1H), 4.84 (d, J = 9.6 Hz, 1H), 4.48 - 4.33 (m, 3H), 4.29 - 4.24 (m, 1H), 3.91 - 3.83 (m, 1H), 3.67 - 3.61 (m, 1H), 2.44 (s, 3H), 2.14 - 1.93 (m, 2H), 1.91 (s, 3H), 1.38 (s, 3H), 1.28 (s, 3H). |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 2 steps 1: sodium hydrogencarbonate; tetrabutylammomium bromide / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere | ||
| Multi-step reaction with 2 steps 1: tetrabutylammomium bromide; sodium hydrogencarbonate / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 3 steps 1: sodium hydrogencarbonate; tetrabutylammomium bromide / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere 3: potassium iodide; potassium carbonate / N,N-dimethyl-formamide / 16 h / 60 °C / Inert atmosphere | ||
| Multi-step reaction with 3 steps 1: tetrabutylammomium bromide; sodium hydrogencarbonate / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C 3: potassium carbonate; potassium iodide / N,N-dimethyl-formamide; acetonitrile / 16 h / 60 °C / Inert atmosphere |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 4 steps 1: sodium hydrogencarbonate; tetrabutylammomium bromide / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere 3: potassium iodide; potassium carbonate / N,N-dimethyl-formamide / 16 h / 60 °C / Inert atmosphere 4: dichloromethane / 1 h / 25 °C / Inert atmosphere | ||
| Multi-step reaction with 4 steps 1: tetrabutylammomium bromide; sodium hydrogencarbonate / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C 3: potassium carbonate; potassium iodide / N,N-dimethyl-formamide; acetonitrile / 16 h / 60 °C / Inert atmosphere 4: dichloromethane / 1 h / 25 °C |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 5 steps 1: sodium hydrogencarbonate; tetrabutylammomium bromide / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere 3: potassium iodide; potassium carbonate / N,N-dimethyl-formamide / 16 h / 60 °C / Inert atmosphere 4: dichloromethane / 1 h / 25 °C / Inert atmosphere 5: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / N,N-dimethyl-formamide / 1 h / 0 - 25 °C / Inert atmosphere | ||
| Multi-step reaction with 5 steps 1: tetrabutylammomium bromide; sodium hydrogencarbonate / water; ethyl acetate / 16 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C 3: potassium carbonate; potassium iodide / N,N-dimethyl-formamide; acetonitrile / 16 h / 60 °C / Inert atmosphere 4: dichloromethane / 1 h / 25 °C 5: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / N,N-dimethyl-formamide / 1 h / 0 - 25 °C / Inert atmosphere |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 2 steps 1: sodium hydrogencarbonate; tetrabutylammomium bromide / ethyl acetate / 15 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere | ||
| Multi-step reaction with 2 steps 1: tetrabutylammomium bromide; sodium hydrogencarbonate / ethyl acetate / 15 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Multi-step reaction with 3 steps 1: sodium hydrogencarbonate; tetrabutylammomium bromide / ethyl acetate / 15 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere 3: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / N,N-dimethyl-formamide / 1 h / 0 - 25 °C / Inert atmosphere | ||
| Multi-step reaction with 3 steps 1: tetrabutylammomium bromide; sodium hydrogencarbonate / ethyl acetate / 15 h / 0 - 60 °C 2: dichloromethane / 1 h / 25 °C / Inert atmosphere 3: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / N,N-dimethyl-formamide / 1 h / 0 - 25 °C / Inert atmosphere |
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 46.83% | With tetrabutylammomium bromide; sodium hydrogencarbonate In ethyl acetate at 0 - 60℃; for 15h; | C-15.C. Step 3 C. Step 3 To a mixture of (2S,4R)-1-[(2R)-2-acetamido-3-methyl-3-sulfanyl-butanoyl]-4-hydroxy-N-[[4-(4-methylthiazol-5-yl)phenyl]methyl]pyrrolidine-2-carboxamide (50 mg, 101.91 μmol), tert-butyl N-[2-[4-(2-bromoethyl)phenyl]ethyl]-N-tert-butoxycarbonyl-carbamate (52.38 mg, 122.29 μmol) and TBAB (131.41 mg, 407.63 μmol) in EtOAc (1 mL) was added saturated NaHCO3 solution (302.00 mg, 3.59 mmol, 0.2 mL) at 0 °C. The mixture was stirred at 60 °C for 15 hours. The reaction mixture was diluted with water (5 mL) and extracted with Ethyl acetate (5 mL x 3). The combined organic phase was dried with anhydrous Na2SO4, filtered and concentrated in vacuo. The residue was purified by preparative TLC on silica gel (Dichloromethane/Methanol = 20/1) to afford the desired product tert-butyl N-[2-[4-[2-[(2R)-2-acetamido-3-[(2S,4R)-4-hydroxy-2-[[4-(4-methylthiazol-5-yl)phenyl]methylcarbamoyl]pyrrolidin-1-yl]-1,1-dimethyl-3-oxo-propyl]sulfanylethyl]phenyl]ethyl]-N-tertbutoxycarbonyl-carbamate (40 mg, 47.73 μmol, 46.83% yield) as a yellow oil. LCMS: m/z 838.3 [M+H]+. |
| With tetrabutylammomium bromide; sodium hydrogencarbonate In ethyl acetate at 0 - 60℃; for 15h; | C-15.C.3 C. Step 3 To a mixture of (2S,4R)-l-[(2A)-2-acetamido-3-methyl-3-sulfanyl-butanoyl]-4- hydroxy-A-[[4-(4-methylthiazol-5-yl)phenyl]methyl]pyrrolidine-2-carboxamide (50 mg, 101.91 pmol), tert-butyl A-[2-[4-(2-bromoethyl)phenyl]ethyl]-A-tert-butoxycarbonyl-carbamate (52.38 mg, 122.29 pmol) and TBAB (131.41 mg, 407.63 pmol) in EtOAc (1 mL) was added saturated NaHCOs solution (302.00 mg, 3.59 mmol, 0.2 mL) at 0 °C. The mixture was stirred at 60 °C for 15 hours. The reaction mixture was diluted with water (5 mL) and extracted with Ethyl acetate (5 mL x 3). The combined organic phase was dried with anhydrous Na2SO4, filtered and concentrated in vacuo. The residue was purified by preparative TLC on silica gel (Dichloromethane/Methanol = 20/1) to afford the desired product tert-butyl A-[2-[4-[2-[(2R)-2- acetamido-3-[(2S,4R)-4-hydroxy-2-[[4-(4-methylthiazol-5- yl)phenyl]methylcarbamoyl]pyrrolidin-l-yl]-l,l-dimethyl-3-oxo- propyl]sulfanylethyl]phenyl]ethyl]-Ntertbutoxycarbonyl-carbamate (40 mg, 47.73 μmol,46.83% yield) as a yellow oil. LCMS: m/z 838.3 [M+H]+. |