Structure of 1072960-66-7
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CAS No. : | 1072960-66-7 |
Formula : | C12H12BNO5 |
M.W : | 261.04 |
SMILES Code : | CN12CC([O-][B+3]1([C-]1=CC=C(C=C1)C=O)[O-]C(C2)=O)=O |
MDL No. : | MFCD11215233 |
InChI Key : | ATAFRFKGTAHILE-UHFFFAOYSA-N |
Pubchem ID : | 71310647 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P264-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P330-P332+P313-P337+P313-P362-P403+P233-P405-P501 |
* 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 |
---|---|---|
In N,N-dimethyl-formamide; at 80℃;Molecular sieve; Inert atmosphere; | 0.4 mmol of 4-formylphenylboronic acid, 0.5 mmol of N-methyliminodiacetic acid, 4Å molecular sieve (40 mg)After dissolving in N, N-dimethylformamide,Under an argon atmosphereStir at 130 C.The amount of 4-formyl phenyl bromic acid consumed was checked to complete the reaction, and the mixture was cooled to 80 C to produce a compound represented by formula (32). | |
In N,N-dimethyl-formamide; at 130℃;Molecular sieve; Inert atmosphere; | Formyl phenylboronic acid (0.5 mmol), N-methyliminodiacetic acid (1.5 mmol) and 4A molycularis (200 mg) were dissolved in 4 mL of N, N-dimethylformamide (DMF).The reaction mixture was stirred in an argon atmosphereThe reaction mixture was heated to 130 C and stirred.Respectively. After completion of the reaction, the reaction mixture was cooled to room temperature.[0228](I). Without filtration or separation, (a) into the cooled mixtureA mixture of 1,2-phenylenediamine (1, 0.55 mmol; 1.1 eq) and a catalytic amount of KI (0.1 mmol, 0.2 eq)And the inner wall was washed with 1 mL of DMFAnd the mixture was stirred in an atmosphere exposed to air at 80 C.When the mixture prepared in (A) was exhausted, the reaction was terminated and the reaction mixture was cooled to room temperature and the solvent was distilled off under reduced pressure. The mixtureAnd purified by solid column chromatography to prepare a benzimidazole derivative substituted with a boronic acid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
15% | With sodium tris(acetoxy)borohydride; acetic acid; In 1,2-dichloro-ethane; at 20℃; | In a 25 mL round-bottomed flask, 4-Formyl Phenyl MIDA Boronic ester (44.9 mg, 172 μmol, Eq: 1.5), chiral(2S,3R,4S,5R)-4-(3-chloro-2-fluorophenyl)-3-(4-chloro-2-fluorophenyl)-5-(hydroxymethyl)-2-neopentylpyrrolidine-3-carbonitrile (52 mg, 115 μmol, Eq: 1.00), acetic acid (100 μL) and sodium triacetoxyborohydride (36.5 mg, 172 μmol, Eq: 1.5) were combined with DCE (5 ml) to give a light yellow solution. Reaction stirred 4 h at rt. Not complete, added more 4-Formyl Phenyl MIDA Boronic ester (60 mg, 230 μmol, 230 eq), triacetoxyborohydride (48.7 mg, 230 μmol, 2 eq) and acetic acid (1 mL) allowed to stir overnight. The reaction was diluted with ethyl acetate and 0.1N NaOH, organic separated and washed with water (3*). Organic layer was concentrated under reduced pressure and purified with column chromatography (8 g Analogix column, 0-100% Ethyl acetate/heptane) to afford chiral(2S,3R,4S,5R)-4-(3-chloro-2-fluoro-phenyl)-3-(4-chloro-2-fluoro-phenyl)-2-(2,2-dimethyl-propyl)-5-hydroxymethyl-1-[4-(6-methyl-4,8-dioxo-[1,3,6,2]dioxazaborocan-2-yl)-benzyl]-pyrrolidine-3-carbonitrile (12 mg, 15%) as an off-white solid. HRMS (ES+) m/z Calcd for C35H36BCl2F2N3O5[(M+)1+]: LCMS (7 min-C18-PosNeg50-100-Grad-LC RT=4.61, [(M+)1+]: 698.1 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
30%; 60% | With water; potassium iodide; In N,N-dimethyl-formamide; at 80℃; for 24h;Molecular sieve; | In the case where water is contained in the reaction, as shown in the following reaction formula, it is confirmed that benzimidazole having a functional group of boronic acid protected by a protecting group is produced in less than 70% and side reaction is proceeded by 30% or more, This is because in the presence of water, the protective group-protected moiety is hydrolyzed to boronic acid, so that the boronic acid reacts directly with the amine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With potassium iodide; In N,N-dimethyl-formamide; at 100℃; for 24h;Molecular sieve; | Test Example 2. Effect according to reaction temperatureIn order to confirm the effect on the reaction temperature, the reaction was carried out under DMF solvent, KI catalyst and anhydrous condition,The results are shown in Table 2 belowThe results are shown in Table 2 belowAs shown in Table 2, it was confirmed that the reaction proceeded by 97% or more within 2 hours even at a low reaction temperature of 60 C, And when the reaction temperature was set to 80 C or higher, the reaction was completed within 30 minutes |
With potassium iodide; In N,N-dimethyl-formamide; at 80℃;Molecular sieve; Inert atmosphere; | 0.4 mmol of 2-phenylenediamine and 0.4 mmol of KI were added to the reaction mixture, and the inlet of the reaction vessel was opened to prepare an atmosphere for exposure to air, followed by stirring at 80 C. The resulting compound represented by the formula (32) The reaction was terminated, and after cooling to room temperature, the solvent was removed under reduced pressure. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
61% | General procedure: To a stirred solution of 2,3,6,7-tetrakis(4-bromophenyl)-4,8-didecylbenzo[1,2-b:4,5-b′]difuran (7) (0.318g, 0.3mmol), an appropriate boronic acid MIDA ester (1.8mmol), and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (0.066g, 0.09mmol), an argon degassed 1,4-dioxane (6mL) was added. The resulting mixture was stirred at room temperature for 5min under argon atmosphere. Tripotassium phosphate (3M aqueous solution, 1.2mL) was added and the mixture was stirred at 80C for 22h. Reaction mixture was cooled to rt and transferred into a separatory funnel. Chloroform (50mL) and 10% sodium hydroxide (10mL) were added and the layers were separated. Aqueous layer was extracted with chloroform (3×50mL). Combined organic layers were dried over anhydrous magnesium sulfate and concentrated. The crude product was crystallized from chloroform/methanol or p-xylene. |