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CAS No. : | 155180-53-3 | MDL No. : | MFCD00925775 |
Formula : | C17H18F3N3O2S | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FIDNKDVRTLFETI-UHFFFAOYSA-N |
M.W : | 385.40 | Pubchem ID : | 197655 |
Synonyms : |
|
Chemical Name : | 4-(3-(4-Hydroxybutyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile |
Num. heavy atoms : | 26 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.47 |
Num. rotatable bonds : | 6 |
Num. H-bond acceptors : | 6.0 |
Num. H-bond donors : | 1.0 |
Molar Refractivity : | 100.84 |
TPSA : | 99.66 Ų |
GI absorption : | High |
BBB permeant : | No |
P-gp substrate : | No |
CYP1A2 inhibitor : | No |
CYP2C19 inhibitor : | Yes |
CYP2C9 inhibitor : | Yes |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | Yes |
Log Kp (skin permeation) : | -6.73 cm/s |
Log Po/w (iLOGP) : | 2.91 |
Log Po/w (XLOGP3) : | 2.7 |
Log Po/w (WLOGP) : | 3.45 |
Log Po/w (MLOGP) : | 1.51 |
Log Po/w (SILICOS-IT) : | 4.27 |
Consensus Log Po/w : | 2.97 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 0.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -3.71 |
Solubility : | 0.076 mg/ml ; 0.000197 mol/l |
Class : | Soluble |
Log S (Ali) : | -4.45 |
Solubility : | 0.0138 mg/ml ; 0.0000358 mol/l |
Class : | Moderately soluble |
Log S (SILICOS-IT) : | -4.59 |
Solubility : | 0.00979 mg/ml ; 0.0000254 mol/l |
Class : | Moderately soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 2.9 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | Packing Group: | N/A |
GHS Pictogram: |
* 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 |
---|---|---|
77 4-(4,4-dimethyl 3-(4-hydroxybutyl)-5-oxo 2-thioxo-1-imidazolidinyl) 2-(trifluoromethyl) benzonitrile EXAMPLE 77 4-(4,4-dimethyl 3-(4-hydroxybutyl)-5-oxo 2-thioxo-1-imidazolidinyl) 2-(trifluoromethyl) benzonitrile Using the procedure of Example 71, 300 mg of the product of Example 76 were reacted to obtain 236 mg of the expected product melting at 78°-79° C. with a Rf=0.31 (eluant: methylene chloride--acetone (75-25)). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.25 h / 20 °C 2.2: 17.5 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With dipyridinium dichromate In N,N-dimethyl-formamide for 48h; | 14 Example 14: 4-(3-( 4-Cyano-3-( trifluoromethyl)p henyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)butanoic acid RU59063 (145 mg, 0.38 mmol) was dissolved in 2 mL DMF, chargedwith PDC (1.4 g, 3.7 mmol) and stirred for 48 hours, upon which time the mixturewas quenched with 10 mL 1M HCL and extracted into Et20 (5 X 25 mL). The combined organic layers were washed with brine (1 X 100 mL), dried with Na2S04and concentrated down to yield 135 mg (90% yield) pure product. 1H NMR (300MHz, CDCh) o 7.94 (d, J= 8.3, 1H), 7.88 (s, 1H), 7.77 (d, J= 8.2, 1H), 3.82-3.65(m, 2H), 2.50 (s, 2H), 2.14 (s, 2H), 1.59 (s, 6H); 13C NMR (126 MHz, CDCh) o178.6, 177.4, 175.3, 175.2, 137.1, 135.2, 133.5 (q, J = 32.1), 132.1, 127.0 (q, J = 4.7), 121.8 (q, J = 276.2), 114.9, 110.1, 65.2, 43.3, 31.7, 23.1; LRMS (ESI) 421.2(M+Na)+ |
90% | With dipyridinium dichromate In N,N-dimethyl-formamide for 48h; | 1 Example 1: 4-(3-( 4-Cyano-3-( trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)butanoic acid (Ru-Acid) RU59063 ( 4-[3-( 4-hydroxybutyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl]-2-(trifluoromethyl)benzonitrile; 145 mg, 0.3 8 mmol) was20 dissolved in 2 mL DMF and charged with PDC (1.4 g, 3.7 mmol) and stirred for 48hours, and then the mixture was quenched with 10 mL 1 M HCl and extracted intoEt20 (5 x 25 mL). The combined organic layers were washed with brine (1 x 100mL), dried with NazS04 and concentrated down to yield 135 mg (90% yield) pureproduct. 1H NMR (300 MHz, CDCh) o 7.94 (d, J= 8.3, 1H), 7.88 (s, 1H), 7.77 (d, J25 = 8.2, 1H), 3.82-3.65 (m, 2H), 2.50 (s, 2H), 2.14 (s, 2H), 1.59 (s, 6H); 13C NMR(126 MHz, CDCh) o 178.6, 177.4, 175.3, 175.2, 137.1, 135.2, 133.5 (q, J = 32.1),132.1, 127.0 (q, J= 4.7), 121.8 (q, J= 276.2), 114.9, 110.1, 65.2, 43.3, 31.7, 23.1;LRMS (ESI) 421.2 (M+Na)+. |
90% | With dipyridinium dichromate In N,N-dimethyl-formamide for 48h; Inert atmosphere; |
90% | With dipyridinium dichromate In N,N-dimethyl-formamide for 48h; | 1; 14 4-(3-(4-Cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)butanoic acid (Ru-Acid) RU59063 (4-[3-(4-hydroxybutyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl]-2-(trifluoromethyl)benzonitrile; 145 mg, 0.38 mmol) was dissolved in 2 mL DMF and charged with PDC (1.4 g, 3.7 mmol) and stirred for 48 hours, and then the mixture was quenched with 10 mL 1 M HCl and extracted into Et2O (5*25 mL). The combined organic layers were washed with brine (1*100 mL), dried with Na2SO4 and concentrated down to yield 135 mg (90% yield) pure product. 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=8.3, 1H), 7.88 (s, 1H), 7.77 (d, J=8.2, 1H), 3.82-3.65 (m, 2H), 2.50 (s, 2H), 2.14 (s, 2H), 1.59 (s, 6H); 13C NMR (126 MHz, CDCl3) δ 178.6, 177.4, 175.3, 175.2, 137.1, 135.2, 133.5 (q, J=32.1), 132.1, 127.0 (q, J=4.7), 121.8 (q, J=276.2), 114.9, 110.1, 65.2, 43.3, 31.7, 23.1; LRMS (ESI) 421.2 (M+Na)+. |
33% | Stage #1: [3H]-RU 59063 With dipyridinium dichromate In N,N-dimethyl-formamide for 96h; Stage #2: With dipyridinium dichromate In N,N-dimethyl-formamide for 24h; | 4-(3-(4-cyano-3-(trifluoromethyl)phenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl)butanoic acid 9a To a solution of thiohydantoin alcohol 8a (0.3961 g, 1.03 mmol, 1 equiv) in 4.1 mL DMF was added C18 celite (1.35 g) andpyridinium dichromate (1.35 g, 3.59 mmol, 3.48 equiv). This was stirred 4 d, then additional PDC (0.614 g, 1.63 mmol, 1.58equiv) and C18 celite (0.61 g) were added. The mixture was stirred one additional day, then filtered on celite and rinsed with80 mL of diethyl ether. The filtrate was diluted with 40 mL of water, 1 M aq. HCl was added to achieve a pH < 2, the layerswere separated, and the aqueous layer extracted once more with 40 mL EtOAc. The organic layers were washed separatelywith 40 mL each water and brine, combined, dried over MgSO4, and concentrated. The crude extract was trituratedthoroughly in ether and filtered again on celite, then purified by silica gel flash chromatography with 75-100% EtOAc /hexanes (Rf 0.32, 5% MeOH / 20% acetone / 75% DCM) to afford 0.134 g or 33% yield of 9a. The 1H NMR data in CDCl3agrees with the literature.4 IR νmax (cm-1): 3400 - 3100 (broad), 2931, 2235, 1754, 1711, 1504, 1484, 1433, 1420, 1377,1311, 1279, 1177, 1138. 1H NMR (400 MHz, CDCl3) δ 9.09 - 8.02 (bs, 1H), 7.95 (d, J = 8.3 Hz, 1H), 7.89 (d, J = 2.0 Hz, 1H), 7.76 (dd, J = 8.3, 2.1 Hz, 1H), 3.81 - 3.72 (m, 2H), 2.51 (t, J = 6.9 Hz, 2H), 2.22 - 2.10 (m, 2H), 1.60 (s, 6H). HRMS(ESI) m/z calcd for C17H15O3N3F3S [(M-H)-]: 398.07917, measured: 398.07930. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h / Inert atmosphere 2.1: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; benzotriazol-1-ol / dichloromethane / 0.25 h / Inert atmosphere 2.2: 16 h / Inert atmosphere | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; (adamant-1-yl)-acetic acid / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol / dichloromethane / 0.25 h 2.2: 16 h |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.42 h / 20 °C 2.2: 20 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.42 h / 20 °C 2.2: 20 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.33 h / 20 °C 2.2: 21 h | ||
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h 2.1: 1,2-dichloro-ethane; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.33 h / 20 °C 2.2: 21 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 48 h / Inert atmosphere 2.1: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; benzotriazol-1-ol / dichloromethane / 0.25 h / Inert atmosphere 2.2: 16 h / Inert atmosphere |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With di-isopropyl azodicarboxylate; triphenylphosphine In tetrahydrofuran at 0 - 20℃; for 0.5h; Inert atmosphere; | General synthetic procedure of target compounds To a solution of 2-(2,6-dioxopiperidin-3-yl)-4-hydroxyisoindoline-1,3-dione (99 mg, 0.360mmol, 1.2 eq), RU-59063 (116mg, 0.300mmol, 1.0 eq), and triphenylphosphine(102 mg, 0.390mmol, 1.3 eq) in anhydrous tetrahydrofuran(5 mL) under nitrogen atmosphere, DIAD (91 mg,0.450mmol, 1.5 eq) was added dropwise in ice bath. Thereaction mixture was stirred at room temperature for 0.5 h.The reaction solution was concentrated under reduced pressureand the residue was purified by column chromatographyon silica gel to afford the target compound PAP508. 4-(3-(4-((2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindolin-4-yl)oxy)butyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile (PAP508)1H NMR (DMSO-d6, 400MHz): δ = 11.11 (s, 1H, NH-12′), 8.33 (d, J = 8.3 Hz, 1H, Ar-H), 8.24 (d, J = 1.7 Hz,1H, Ar-H), 8.01 (m, 1H, Ar-H), 7.81 (dd, J = 8.5, 7.3 Hz,1H, Ar-H), 7.52 (d, J = 8.5 Hz, 1H, Ar-H), 7.45 (d, J =7.2 Hz, 1H, Ar-H), 5.08 (m, 1H, H-10′), 4.28 (t, J = 5.9 Hz,2H, CH2), 4.06-3.70 (m, 2H, CH2), 2.88 (td, J = 16.5, 13.7,5.1 Hz, 1H, CH2), 2.70-2.48 (m, 2H, CH2), 2.06-2.01 (m,1H, CH2), 2.01-1.92 (m, 2H, CH2), 1.91-1.81 (m, 2H,CH2), 1.54 (s, 6H, CH3-14, CH3-15).13C NMR (DMSO-d6, 101 MHz): δ = 178.6 (C=O),175.8 (C=O), 173.2 (C=S, C-13), 170.4 (C=O), 167.3(C=O), 165.8 (C=O), 156.3 (Ar-C, C-1′), 138.6 (Ar-C, C-5), 137.5 (Ar-C), 136.4 (Ar-C), 134.5 (Ar-C), 133.7 (Ar-C),131.4 (q, JCF = 32.5 Hz, C-3), 128.5 (q, JCF = 4.7 Hz, C-2),122.7 (q, JCF = 273.8 Hz, C-8), 118.6 (Ar-C), 116.7 (Ar-C),115.7 (CN, C-7), 115.5 (Ar-C), 108.8 (q, JCF = 1.9 Hz, C-4), 69.1 (Al-C), 65.7 (Al-C), 49.2 (Al-C), 49.0 (Al-C), 43.7(Al-C), 31.4 (Al-C), 26.4 (Al-C), 24.9 (Al-C), 22.6 (CH3),22.4 (CH3).ESI, m/z: 642.1[M+H]+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With 1,4-diaza-bicyclo[2.2.2]octane | 1 Example 1 Preparation of intermediate 6 After weighing 2-aminoisobutyric acid methyl ester hydrochloride (1.1 g, 1 eq) and 4-bromo-1-butanol (1.3 g, 1.2 eq) to obtain intermediate 3, by reacting with less toxic cyanoisobenzoate, high yield of intermediate 4 can be obtained.Subsequently, intermediate 4 was reacted with TsCl (1.5eq) and DABCO (2eq) to obtain intermediate 5, and finally was refluxed with NaN3 (3eq) at 80 C for 6h. After the reaction was completed, acetone was evaporated, extracted with ethyl acetate 3 times, saturated It was stripped once with brine, and the organic layers were combined, dried over anhydrous magnesium sulfate, filtered with suction, concentrated under reduced pressure, and purified by column chromatography to obtain Intermediate 6, a white solid 530 mg, and a 90% yield. | |
With 1,4-diaza-bicyclo[2.2.2]octane at 0℃; | General procedure: Compounds 6a-c, 9, 11 and 13 were prepared following the method as described for 6a. 5a (1 g, 5.26 mmol) reacted with 3-Fluoro-4-methylphenylisothiocyanate (1.23 g, 4.38 mmol) and TEA (0.65 g, 6.57 mmol) in iPrOH (10 mL) under reflux for 3-6 h.Upon completion, the reaction mixture was cooled to room temperature and the colorful precipitate formed was filtered and washed with water to afford the desired compound 6a. 6a then reacted with TsCl at 0 °C, the mixture was kept overnight. Upon completion of the reaction, intermediate was put in the system of acetone with NaN3 reflux 6 h at 80 °C to obtain 7a-c. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1: 1,4-diaza-bicyclo[2.2.2]octane 2: sodium azide / 6 h / 80 °C | ||
Multi-step reaction with 2 steps 1: 1,4-diaza-bicyclo[2.2.2]octane / 0 °C 2: sodium azide / acetone / 6 h / 80 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: 1,4-diaza-bicyclo[2.2.2]octane 2: sodium azide / 6 h / 80 °C 3: copper(II) sulfate / tetrahydrofuran; water / 5 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With triethylamine In isopropyl alcohol Reflux; | General procedure: Compounds 6a-c, 9, 11 and 13 were prepared following the method as described for 6a. 5a (1 g, 5.26 mmol) reacted with 3-Fluoro-4-methylphenylisothiocyanate (1.23 g, 4.38 mmol) and TEA (0.65 g, 6.57 mmol) in iPrOH (10 mL) under reflux for 3-6 h.Upon completion, the reaction mixture was cooled to room temperature and the colorful precipitate formed was filtered and washed with water to afford the desired compound 6a. 6a then reacted with TsCl at 0 °C, the mixture was kept overnight. Upon completion of the reaction, intermediate was put in the system of acetone with NaN3 reflux 6 h at 80 °C to obtain 7a-c. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 3 steps 1: 1,4-diaza-bicyclo[2.2.2]octane / 0 °C 2: sodium azide / acetone / 6 h / 80 °C 3: copper(II) sulfate; sodium L-ascorbate / tetrahydrofuran; water / 8.5 h / 20 °C |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
44% | Stage #1: 2-((4-hydroxybutyl)amino)-2-methylpropanenitrile; 4-isothiocyanato 2-(trifluoromethyl)benzonitrile With triethylamine In tetrahydrofuran for 0.5h; Stage #2: With hydrogenchloride In methanol; water for 2.5h; Reflux; | 4-(3-(4-hydroxybutyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile (RU 59063) 8a To a solution of aryl isothiocyanate 7 (0.5467 g, 2.396 mmol, 0.99 equiv) and triethylamine (46.0 μL, 0.330 mmol, 0.14equiv) in 4.0 mL dry THF was added α-cyanoamine S1 (1 equiv) in 0.8 mL dry THF. The solution was rapidly heated toreflux for 30 mins, then cooled to room temperature and concentrated. The dark residue was purified by silica gel flashchromatography with 15-40% acetone / DCM (Rf 0.13, 20% acetone / DCM) to afford 0.4830 g or 52% yield of theiminothiohydantoin. To a solution of the iminothiohydantoin (0.472 g, 1.23 mmol, 1 equiv) in 7.0 mL MeOH was added 1.0mL of 2 M aq. HCl. The solution was refluxed 2.5 h then cooled to room temperature, diluted with water, and concentratedto remove MeOH. The concentrate was extracted with 3x10 mL EtOAc and the combined organic layers were washed with5 mL brine, then dried over anhydrous Na2SO4. Concentration of the crude material afforded 0.4085 g or 44% yield of purethiohydantoin 8a (Rf 0.41, 20% acetone / DCM) from the isothiocyanate. The 1H NMR data in CDCl3 agrees with theliterature.3 IR νmax (cm-1): 3419, 2233, 1751, 1127. 1H NMR (500 MHz, CDCl3) δ 7.95 (d, J = 8.3 Hz, 1H), 7.89 (d, J = 2.0Hz, 1H), 7.77 (dd, J = 8.3, 2.1 Hz, 1H), 3.78 - 3.71 (m, 4H), 1.95 (tt, J = 8.0, 6.4 Hz, 2H), 1.67 (ddd, J = 13.6, 7.4, 6.2 Hz,2H), 1.60-1.56 (bs, 1H) 1.59 (s, 6H). 13C NMR (126 MHz, CDCl3) δ 178.49, 175.37, 137.23, 135.26, 133.64 (q, J = 33.4Hz), 132.21, 127.16 (q, J = 4.8 Hz), 122.02 (q, J = 274.3 Hz), 114.97, 110.16 (q, J = 2.2 Hz), 65.25, 62.12, 44.04, 29.77,24.87, 23.35. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Multi-step reaction with 2 steps 1.1: dipyridinium dichromate / N,N-dimethyl-formamide / 96 h 1.2: C18 celite / 24 h 2.1: O-(tert-butyldimethylsilanyl)hydroxylamine; 1-hydroxy-7-aza-benzotriazole; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / dichloromethane / 28 h 2.2: 7 h / 20 °C |
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