Structure of 15963-40-3
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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.
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CAS No. : | 15963-40-3 |
Formula : | C7H10O2 |
M.W : | 126.15 |
SMILES Code : | COC(=O)C1CC(=C)C1 |
MDL No. : | MFCD01087180 |
InChI Key : | OSWTXCSCDKIANQ-UHFFFAOYSA-N |
Pubchem ID : | 11051654 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
* 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 |
---|---|---|
72% | To a solution of Et2Zn (11.89 mL, 11.89 mmol) in DCM (10 mL) was added a solution of TFA (0.88 mL, 11.89 mmol) in DCM (10 mL) dropwise at 0 C for 30 minutes. A solution of CH2I2 (0.96 mL, 11.89 mmol) in DCM (10 mL) was added dropwise at 0 C for 45 minutes. The reaction mixture was stirred at 0 C for 1 hour. A solution of methyl 3- methylenecyclobutanecarboxylate (500 mg, 3.96 mmol) in DCM (5 mL) was added to the reaction mixture. The reaction mixture was allowed to warm to 15 C for 16 hours. Saturated NH4CI solution (50 mL) was added to the reaction mixture and the mixture was extracted with DCM (50 mL c 2). The combined organic layers were dried over anhydrous Na2S04, filtered and concentrated. The crude residue was purified by silica gel column chromatography (10 % EtOAc in petroleum ether) to afford the title compound (400 mg, 72 %) as a yellow oil. ' H NMR (400 MHz, CDCl3) d 3.71 (s, 3H), 3.34 - 3.27 (m, 1H), 2.53 - 2.48 (m, 2H), 2.26 - 2.20 (m, 2H), 0.49 - 0.42 (m, 4H). | |
63% | To a solution of diethylzinc (1.0 M in hexane, 46 mL, 46 mmol) in DCM (200 mL) was added a solution of TFA (3.54 mL, 46 mmol) in DCM (50 mL) dropwise at 0 C for 30 min. A solution of diiodomethane (3.7 mL, 46 mmol) in DCM (50 mL) was added dropwise at 0 C for 45 min. The mixture was stirred at the same temperature for 1 h. A solution of compound A141-2 (2.52 g, 20 mmol) in DCM (30 mL) was added to the reaction mixture. The mixture was allowed to warm to room temperature for overnight. The reaction mixture was quenched with saturated NH4C1 aq. (200 mL) and extracted with DCM. The collected organic layer was dried over MgS04 and concentrated under reduced pressure. The residue was purified by silicagel chromatography (20% EtOAc/hexane as eluent) to provide compound Al 41-3 (1.77 g, 63%) as a colorless oil. | |
A cold (0C) solution of diethyl zinc (79.3 mL, 1.0 M in Hexanes) in dichloromethane (66 mL) was treated with the dropwise addition of TFA (6.11 mL, 79.3 mL) in dichloromethane (27 mL). After 1 hour of stirring, diiodomethane (6.39 mL, 79.3 mmol) in dichloromethane (27 mL) was then introduced. After 40 min, I-13A (4.00 g, 31.7 mmol) dichloromethane (10 mL) was added dropwise. The reaction was left to stir for 2 hours and then quenched with sat'd NH4CI (aq.). Phases were separated and the organic phase collected, dried (MgS04), filtered, concentrated, and distilled (42-44C, 0.1 mmHg) to afford the desired spirocycle. (400 MHz, CDC13) delta 3.69 (s, 3H), 3.28 (m, 1H), 2.49 (m, 2H), 2.22 (m, 2H), 0.43 (m, 4H); MS m/z 141.1 (M + 1). |
1.9 g | Description 67Methyl spiroL2.3]hexane-5-carboxylate (D67)To an ice-cooled (0C) solution of diethylzinc (1.0 M in hexane) (39.6 mL) in DCM (30 mL) was added dropwise a solution of TFA (3.05 mL) in DCM (10 mL). After one hour of stirring, diiodomethane (10.62 g) in DCM (10 mL) was then introduced. After 40 mm, the solution of methyl 3-methylene cyclobutanecarboxylate (D66, 2.0 g) in DCM (4 mL) was added dropwise. Thereaction was stirred at RT for 2 hours and then quenched with saturated NH4C1 solution (30 mL).The organic layer was separated, dried and concentrated to afford the title compound (1.9 g) as paleyellow oil. MS (ESI): C8H1202 requires 140; found 139 [M-H]. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With diazomethyl-trimethyl-silane; In hexanes; dichloromethane; at 0℃; for 0.5h; | A cold (0C) solution of 3- methylenecyclobutanecarboxylic acid (WO2007/063391, 6.07 g, 54.1 mmol) indichloromethane (180 mL) and methanol (18 mL) was treated with the dropwise addition of (trimethylsilyl)diazomethane (28.4 mL, 2.0 M in Hexanes). After 30 min, 1 mL of cone. HOAc was added and the reaction concentrated in vacuo. (400 MHz, CDC13) delta 4.78 (m, 2H), 3.67 (s, 3H), 3.10 (m, 1H), 2.98 (m, 2H), 2.88 (m, 2H); MS m/z 127.1 (M + 1). |
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