Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Intermediate of flavonoid compound and preparation method and application thereof

A technology of flavonoids and compounds, applied in the direction of sugar derivatives, organic chemistry, drug combination, etc., can solve the problems of low extraction efficiency, complicated and cumbersome operation of separating and extracting compounds of formula A, and difficulty in satisfying research applications, etc.

Inactive Publication Date: 2012-05-23
SHANGHAI INST OF PHARMA IND CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a new intermediate compound for synthesizing the compound of formula A in order to overcome the existing complex and cumbersome operation of separating and extracting the compound of formula A from plants, the extraction efficiency is low, and it is difficult to meet the needs of research and application. Its preparation method, and its application in the preparation formula A compound

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Intermediate of flavonoid compound and preparation method and application thereof
  • Intermediate of flavonoid compound and preparation method and application thereof
  • Intermediate of flavonoid compound and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] Preparation of formula M compound:

[0058] Reference example 1 5,7, the synthesis of 4 '-O-trihexanoyl apigenin (formula M compound, R 1 for -CO(CH 2 ) 4 CH 3 )

[0059] Apigenin (Formula G, R 1 for -CO(CH 2 ) 4 CH 3 , 1.08g, 4mmol), 4-dimethylaminopyridine (155mg, 1.2mmol), triethylamine (2.6ml, 20mmol,) were dissolved in 10ml of dimethylformamide, hexanoyl chloride (3.2ml, 22.8mmol), stirring reaction under 25 ℃ of temperature 8 hours (TLC detects that apigenin is consumed), system is diluted with dichloromethane, organic phase is washed twice with saturated brine, dried over anhydrous sodium sulfate, filters and collects organic phase, After concentration, the crude product was recrystallized from ethanol to obtain a white solid (1.95 g, yield 88%).

[0060] 1 H NMR (400MHz, CDCl3) δ: 0.91(m, 9H); 1.34(m, 12H); 1.75(m, 6H); 2.57(m, 4H); 2.76(d, 2H); 6.62(s, 1H) ;6.83(s,1H);7.26(d,2H);7.33(s,1H);7.88(d,2H)

[0061] MS: 565(M+H); 1151(2M+Na)

[0062] Refe...

Embodiment 1

[0080] Embodiment 1 The synthesis (formula E compound, R 1 =-CO(CH 2 ) 4 CH 3 )

[0081] Formula F (n=4, 2g, 3.5mmol) was dissolved in a mixed solvent of 15ml of dichloromethane and 15ml of methanol, after cooling to 0°C, potassium carbonate (69mg, 0.5mmol) was added, and the temperature was naturally raised to 20°C, and reacted for 8 hours (TLC shows that formula F is consumed), add 1mol / L hydrochloric acid methanol to neutralize, remove the solvent by rotary evaporation, separate and purify by silica gel column chromatography (dichloromethane: acetone=30:1) to obtain a light yellow solid (1.52g, 90.3 %).

[0082] 1 H NMR (400MHz, CDCl 3 )δ:0.92(m,3H);1.39(m,4H);1.46(m,2H);2.67(t,2H);5.31(s,2H);6.49(s,1H);6.73(d,1H ); 7.06(d, 2H); 7.21(d, 1H); 7.36(m, 5H); 7.88(d, 2H), 9.02(s, 1H)

[0083] 13 C NMR (CDCl 3 )δ: 13.9, 22.3, 24.1, 31.3, 34.3, 99.9, 105.9, 108.9, 111.0, 116.1, 116.2, 122.2, 127.4, 127.5, 127.8, 128.7, 128.8, 135.3, 150.3, 158.6, 160.1, 162 , 177.0

[...

Embodiment 2

[0085] Example 2 Synthesis of 5-O-hexanoyl-7-O-benzyl-4'-hydroxypigenin (formula E compound, 1 =-CO(CH 2 ) 4 CH 3 )

[0086] Formula F (n=4, 2g, 3.5mmol) was dissolved in a mixed solvent of 7.5ml of dichloromethane and 7.5ml of methanol, cooled to -10°C, added sodium carbonate (53mg, 0.5mmol), and naturally rose to 30°C, Reacted for 10 hours (TLC showed that Formula F was consumed), added 1 mol / L methanol hydrochloric acid to neutralize, removed the solvent by rotary evaporation, and purified by silica gel column chromatography (dichloromethane:acetone=30:1) to obtain a light yellow solid (1.40 g, 83.2%).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an intermediate of a flavonoid compound shown in a formula E and a preparation method thereof. In the mixed solvents of a non-protonic solvent and an alcohol solvent, under the action of an alkaline reagent, the compound shown in the formula F undergoes selective dehydroxylation protecting group reaction, wherein R1 is -CO(CH2)nCH3 or benzoyl; n ranges from 0 to 8; and Bn is the benzyl. The invention also relates to application of the intermediate of the flavonoid compound shown in the formula E in preparation of the flavonoid compound shown in the formula A. Compared with the conventional method for separating and extracting the flavonoid compound shown in the formula A from the plant, the method for preparing the flavonoid compound shown in the formula A from theintermediate of the flavonoid compound shown in the formula E can realize large-scale industrialized production, and has the advantages of simple steps, no special reagent or harsh requirements on reaction conditions, and high yield and purity.

Description

technical field [0001] The invention relates to a class of flavonoid compound intermediates and a preparation method and application thereof. Background technique [0002] Common ischemic diseases include coronary heart disease, cerebral insufficiency, cerebral infarction and other heart and cerebrovascular ischemic diseases, which are one of the main diseases that endanger human health. Ischemic cerebrovascular diseases account for 50-70% of all cerebrovascular diseases, and are characterized by high morbidity, high mortality and high disability rate. health. [0003] Apigenin 7-O-β-D-glucoside-4`-O-α-L-rhamnoside (Formula A) (English name: apigenin-7-O-β-D-glucopyranosyl-4`-O- α-L-rhamnopyranosid) is a flavonoid compound, which can be extracted and isolated from Ranunculus genus plants, such as Ranunculus sieboldii and R. sceleratus, and has certain anti-tumor, anti-HBV and The role of HSV-1. (Pan Yunxue, Study on the Chemical Constituents of Ranunculus chinensis, Chine...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/30C07H17/07A61P9/10
CPCY02P20/55
Inventor 林峰姚林高祺陈建丽
Owner SHANGHAI INST OF PHARMA IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com