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ChemicalBook CAS DataBase List 2-(Hydroxymethyl)pyridine
586-98-1

2-(Hydroxymethyl)pyridine synthesis

10synthesis methods
The preparation of 2-(Hydroxymethyl)pyridine is as follows:NaOH (0.5 g, 12.5 mmol), Al2O3 (2.0 g, 19.6 mmol), aldehyde 1f-g (2 mmol) and H2O (400 μL) were grinded in a mortar. Next, the paste were placed in a glass 10 mL pressure vials and reaction was carried out in microwave reactor: standard mode (200 W), 100 °C, 2 min. After that, reaction mixture was extracted with DCM (2 × 20 mL). Organic layer was evaporated under reduce pressure yielding 2f-g. Solid residue was washed by water (2 × 15 mL). Aqueous phase was acidify with 1N HCl to pH 5.5 and centrifuged. After that aqueous layer was pour down and precipitate was lyophilisated. Products 3f-g were obtained as white solids.

586-98-1.png

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Yield:586-98-1 99%

Reaction Conditions:

with C30H34Cl2N2P2Ru;potassium methanolate;hydrogen in tetrahydrofuran at 100; under 38002.6 - 76005.1 Torr; for 24 h;Glovebox;Autoclave;

Steps:

27 Example 27: Hydrogenation of ester compounds catalyzed by ruthenium complex Ia

General procedure: In a glove box, add a ruthenium complex Ia (0.3 to 0.7 mg, 0.0002 to 0.001 mmol) to a 300 mL autoclave,Potassium methoxide (35-700 mg, 0.5-10 mmol), tetrahydrofuran (4-60 mL), and ester compounds (10-200 mmol).After sealing the autoclave, take it out of the glove box and fill it with 50 100atm of hydrogen.The reaction kettle was heated and stirred in an oil bath at 100 ° C for 10 to 336 hours.After the reaction kettle was cooled in an ice-water bath for 1.5 hours, the excess hydrogen was slowly released.The solvent was removed from the reaction solution under reduced pressure, and the residue was purified with a short silica gel column to obtain an alcohol compound. The results are shown in Table 5.

References:

CN110357923,2019,A Location in patent:Paragraph 0301-0303; 0306

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