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CAS No. : | 373384-18-0 | MDL No. : | MFCD03092935 |
Formula : | C7H9BO4S | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | HZFFUMBZBGETES-UHFFFAOYSA-N |
M.W : | 200.02 | Pubchem ID : | 2773542 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
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 |
---|---|---|
86% | With sodium carbonate;tetrakis(triphenylphosphine) palladium(0); In ethanol; water; toluene; at 120℃; for 6h;Sealed; Microwave irradiation; | Method C (Suzuki-Miyaura cross coupling)A mixture of 3-iodo-lH-indazole (1.0 equiv), 3-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2- yl)benzenesulfonamide (1.2 equiv), base and palladium catalyst (0.05 equiv) in solvents was degassed with Ar and heated sealed in a Biotage microwave reactor. The crude material after filtration through Celite using MeOH to rinse the pad. In the majority of examples, purification by preparative HPLC provided the target material.To a mixture of arylboronic acid (5 mmol) and glyoxylic acid monohydrate (460 mg, 5 mmol) in CH2CI2 (25 mL) was added dialkylamine (5 mmol). The resulting mixture was stirred overnight at rt. After evaporation of solvents, it was used as crude or purified by column chromatography.Synthesis of 3-(3-(methylsulfonyl)phenyl)-lH-indazole-5-carboxylic acidThe title compound was synthesized according to the General Method C, utilizing 3-iodo- lH-indazole-5-carboxylic acid (1.002 g, 3.47 mmol), (3-(methylsulfonyl)phenyl)boronic acid-68-4820V.1 (891.7 mg, 4.46 mmol), Pd(PPh3)4 (107.0 mg, 0.093 mmol), toluene (7 mL), EtOH (7 mL), and saturated aqueous Na2C03 (3.5 mL). The degassed solution was sealed and heated in a microwave reactor at 120 C for 6 h. After cooling to room temperature, the mixture was diluted with Et20 (300 mL) and acidified with aqueous HC1 (1M, 25 mL) and water (50 mL).Undissolved solid was collected by filtration and rinsed with water (10 mL) and 25% EtOH / Et20 (10 mL). The separated Et20 layer was discarded since it contained only traces of product. The wet solid was transferred using a mixture of acetone, THF and DMF, and evaporated in vacuo. MeOH in Et20 (50%, 10 mL) was added and the suspension was sonicated, and filtered. The solid was rinsed with MeOH in Et20 (50%, 10 mL) to provide the title compound as an pale grey solid (946.1 mg, 86 %). NMR (400 MHz, DMSO-d6) 8 ppm 13.79 (s, 1 H), 12.95 (br.s, 1H), 8.68 (s, 1 H), 8.47 (s, 1 H), 8.35 (d, J=8.0 Hz, 1 H), 8.00 (d, J=8.5 Hz, 2 H), 7.86 (t, J=8.0 Hz, 1 H), 7.71 (d, J=9.3 Hz, 1 H), 3.31 (s, 3 H); MS ESI 317.2 [M + H]+, calcd for [Ci5H12N204S + H]+ 317.0. |
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