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CAS No. : | 5071-96-5 | MDL No. : | MFCD00008115 |
Formula : | C8H11NO | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | GRRIMVWABNHKBX-UHFFFAOYSA-N |
M.W : | 137.18 | Pubchem ID : | 21156 |
Synonyms : |
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Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | 2735 |
Hazard Statements: | H302-H315-H318-H335 | Packing Group: | Ⅲ |
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 |
---|---|---|
In N,N-dimethyl-formamide; at 80℃; for 18h; | A solution of commercially available <strong>[6345-43-3]pyrimidine-4,6-dicarboxylic acid dimethyl ester</strong> (1.96 g) and commercially available 3-methoxy-benzylamine (1.38 mL) in dry N,N-dimethylformamide (10 mL) was placed in a preheated oil bath (80 C.). After stirring at this temperature for 18 h the mixture was concentrated and flash filtered (silica, cyclohexane/ethyl acetate). The obtained material was suspended in dry tetrahydrofurane (10 mL) and treated with a solution of lithium hydroxide (642 mg) in water (15 mL). The resulting mixture was stirred at room temperature for 16? h, diluted with water (35 mL), washed with dichloromethane (3×50 mL) and acidified by addition of a 1M aqueous solution of hydrochloric acid (20 mL). The formed precipitate was isolated by suction, washed with water (2×50 mL) again suspended/dissolved in water (200 mL) and ultrasonificated for 5 min. The remaining precipitate was isolated by suction and dried under reduced pressure to afford the title compound (700 mg; 24%). [MH]+=288. | |
In N,N-dimethyl-formamide; at 80℃; for 18h; | Preparative Example 202; Step A; A solution of commercially available <strong>[6345-43-3]pyrimidine-4,6-dicarboxylic acid dimethyl ester</strong> (1.96 g) and commercially available 3-methoxy-benzylamine (1.38 mL) in dry N,N-dimethylformamide (10 mL) was placed in a preheated oil bath (80 C.). After stirring at this temperature for 18 h the mixture was concentrated and flash filtered (silica, cyclohexane/ethyl acetate). The obtained material was suspended in dry tetrahydrofuran (10 mL) and treated with a solution of lithium hydroxide (642 mg) in water (15 mL). The resulting mixture was stirred at room temperature for 16? h, diluted with water (35 mL), washed with dichloromethane (3×50 mL) and acidified by addition of a 1M aqueous solution of hydrochloric acid (20 mL). The formed precipitate was isolated by suction, washed with water (2×50 mL) again suspended/dissolved in water (200 mL) and ultrasonificated for 5 min. The remaining precipitate was isolated by suction and dried under reduced pressure to afford the title compound (700 mg; 24%). [MH]+288. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
A library of compounds in which R4 was various groups having the formula [CONHR ?] was prepared by the process described above using 4-fluoro-3-nitrobenzoic acid, as follows: [72] Aldehyde resin was mixed with a primary amine (R17-NH2) in [DICHLOROETHANE] (DCE), triethylorthoformate (TEOF), and DMF (containing [1%] acetic acid) in a 1: 1: 1 ratio. After shaken overnight, sodium triacetoxyborohydride (20 eq. ) dissolved in DMF was added (Abdel-Magid, A. F. , et al., Tetrahedron Lett, 3 1: 5595-5598 (1990) ). After the mixture was shaken at room temperature overnight, the resin was filtered and washed with DMF (3 x 5 mL), [MEOH] [(3 X 5] mL), DMF [(3 X 5] mL), [MEOH] [(3 X 5] mL), and [CH2CL2] [(3 X 5] mL). The resin was washed twice with 5 mL DMF containing [1%] Hunig's base. To the filtered resin was added a mixture of 4-fluoro-3-nitrobenzoic acid (FNBA, 10 eq. ) and diisopropylcarbodiimide (DIC, 5 eq. ) in 2: 1 DMF : DCM. After shaking at room temperature overnight, the resin was filtered and washed with DMF (3 x 5 mL) and [CH2C12] (3 x 5 mL). [73] The resin was shaken with a primary amine [(R2-NH2)] in DMF for 8 hrs, filtered, and washed with DMF (6 x 5 mL), [MEOH] [(3 X 5] mL), and CH2C12 (3 x 5 mL). The aryl nitro group was reduced by the addition of tin (II) chloride dihydrate (20 eq. , >2 M) and N-methyl morpholine (NMM, 20 eq. ) in N-methyl pyrrolidinone (NMP). After shaken at room temperature overnight, the resin was filtered and washed with NMP (3 x 5 mL), [MEOH] (3 x 5 mL), and [CH2CI2 (3 X 5] mL). The resulting resin was shaken at room temperature with cyanogen bromide (5 eq. ) overnight, filtered, and washed with CH2Cl2 (3 x 5 mL), [MEOH] (3 x 5 mL), and CH2CI2 (3 x 5 mL). To produce a free amine, the resin was shaken for 30 min. in CHCl2 with the addition of sodium methoxide in methanol, filtered, and washed with CH2Cl2 [(4 X 5] mL). [[74]] In the final diversification step, the resin was heated at 500 C in DMF with a mono- substituted epoxide [[RLCH (-CH2O-)].] After shaking for 2 to 4 days the resin was filtered and washed with DMF (5 x 5 mL), [MEOH] [(3 X 5] mL), and CH2Cl2 (3 x 5 mL). T he resin-bound benzimidazole was cleaved from the solid-support by treatment with TFA: [CH2C12] (2: 3) for 1 hour at room temperature. |