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Chemical synthesis method of S-(+)-3-hydroxytetrahydrofuran

A technology of hydroxytetrahydrofuran and chemical synthesis, applied in the directions of organic chemistry methods, organic chemistry, etc., can solve the problems of complicated operation, low yield, unguaranteed purity, etc., and achieve the effect of high yield and simple operation

Inactive Publication Date: 2019-03-22
南京天越星生物技术有限公司
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  • Abstract
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Problems solved by technology

[0003] S-(+)-3-hydroxytetrahydrofuran is a key intermediate required for the synthesis of afatinib. The traditional preparation method of S-(+)-3-hydroxytetrahydrofuran not only cannot guarantee the purity, but also has a low yield. High, the operation is very loaded down with trivial details, so need a kind of chemical synthesis method of S-(+)-3-hydroxytetrahydrofuran now

Method used

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  • Chemical synthesis method of S-(+)-3-hydroxytetrahydrofuran

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Embodiment 1

[0017] The preparation of embodiment 1 S-dimethyl malate (compound 2)

[0018]

[0019] Add L-malic acid (compound 1, 40.3g, 0.35mol) and anhydrous MeOH (120mL) to the reaction flask, cool to 0°C, add thionyl chloride (49mL, 0.56mol) dropwise, after the addition is complete , the reaction naturally rose to room temperature, and reacted overnight. After the reaction was completed, the reaction solution was concentrated under reduced pressure, dichloromethane (120 mL) was added to dissolve the residue, and washed with saturated sodium carbonate until neutral. The organic phase was dried, filtered and concentrated to obtain compound 2 (43 g).

Embodiment 2

[0020] Example 2 Preparation of S-1,2,4 butanetriol (compound 3)

[0021]

[0022] Compound 2 (8.6 g, 0.05 mol) was dissolved in THF (100 mL), under nitrogen protection, 0.23 g of sodium carbonate was added, and sodium borohydride (7 g, 0.21 mol) was added in batches at a temperature lower than 40°C, and stirred for 1 h. Heated to reflux for 10h. Concentrate to remove the solvent, add concentrated hydrochloric acid to adjust the pH of the solution to neutral, extract with 200mL ethyl acetate, concentrate compound 3 (4g), and directly put the crude product into the next reaction without purification.

Embodiment 3

[0023] Example 3 Preparation of S-(+)-3-hydroxytetrahydrofuran

[0024]

[0025] Take the crude product compound 3 (15.9 g, 0.15 mol) obtained in the previous step reaction in a reaction flask. Add p-toluenesulfonic acid monohydrate (0.5 g, 2.7 mmol)). Stir, reduce pressure, and heat to dissolve p-toluenesulfonic acid. Gradually raise the temperature to 90°C, a colorless liquid drops out at 70°C / 40Pa, and collect this fraction. This liquid contains a small amount of water generated due to the reaction, and the resulting product is dissolved in THF, dried over anhydrous sodium sulfate, filtered with suction, and the solvent is removed by rotary evaporation to obtain a colorless liquid S-(+)-3-hydroxytetrahydrofuran (10g) .

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Abstract

The invention discloses a chemical synthesis method of S-(+)-3-hydroxytetrahydrofuran. The method comprises the following steps: 1, subjecting a compound 1 to a reaction in the presence of thionyl chloride and methanol to obtain a compound 2; 2, subjecting the compound 2 to a reaction in a solvent in the presence of a reducing agent and a base to obtain a compound 3; and 3, subjecting the compound3 to a reaction in the presence of p-toluenesulfonic acid to obtain a compound, namely S-(+)-3-hydroxytetrahydrofuran.

Description

technical field [0001] The invention relates to the field of drug synthesis, in particular to a chemical synthesis method of S-(+)-3-hydroxytetrahydrofuran. Background technique [0002] Afatinib is a potent and irreversible dual inhibitor of epidermal growth factor receptor (EGFR) and human epidermal growth factor receptor 2 (HER2) tyrosine kinase, and is a new generation of oral small molecule tyrosine Kinase inhibitors (TKIs), the first irreversible ErbB family blockers, can act on the entire ErbB family including EGFR. [0003] S-(+)-3-hydroxytetrahydrofuran is a key intermediate required for the synthesis of afatinib. The traditional preparation method of S-(+)-3-hydroxytetrahydrofuran not only cannot guarantee the purity, but also has a low yield. High, the operation is very loaded down with trivial details, so need a kind of chemical synthesis method of S-(+)-3-hydroxytetrahydrofuran now. Contents of the invention [0004] In order to solve the above problems, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/20
CPCC07D307/20C07B2200/07
Inventor 吴学平金玉宝
Owner 南京天越星生物技术有限公司
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