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11-brominated-12-oleanane type pentacyclic triterpenoid and application thereof

A technology of pentacyclic triterpenoids and ene oleananes, which is applied in the field of polyoxidatively substituted pentacyclic triterpene derivatives and their preparation, can solve the problem of high incidence of adverse reactions of non-steroidal anti-inflammatory drugs, liver function Failure, aggravation of peptic ulcer and other problems

Inactive Publication Date: 2008-11-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the incidence of adverse reactions of NSAIDs is also very high, generally manifested in the induction or aggravation of peptic ulcers, which limits their wide application
Recent studies have also found that long-term and high-dose use of drugs such as aspirin, phenylbutazone, oxybutazone, and indomethacin can cause liver damage, and in severe cases, even lead to liver failure and death

Method used

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  • 11-brominated-12-oleanane type pentacyclic triterpenoid and application thereof
  • 11-brominated-12-oleanane type pentacyclic triterpenoid and application thereof
  • 11-brominated-12-oleanane type pentacyclic triterpenoid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0049] Preparation Example 1: Preparation of Compound Ii

[0050] The compound 3-methylsulfonyloxy-oleanane-28-acid-12-ene (1.0mmol) was dissolved in 5 ml of DMAC (N,N'-dimethylacetamide), and lithium carbonate ( 2.0 mmol). The reaction mixture was heated to reflux for half an hour. After cooling, excess lithium carbonate was filtered off, the filtrate was added to 10 ml of water, extracted with ether, and the organic phase was washed with water until neutral. Dry over anhydrous sodium sulfate. Silica gel column chromatography (eluent: petroleum ether / ethyl acetate: 8 / 1) yielded oleanane-28-acid-2,12-diene as a white solid with a yield of 82%.

[0051] In 20 ml of acetic acid (containing 5% acetic anhydride), the compound oleanane-28-acid-2,12-diene (0.82 mmol) and chromium trioxide (4.92 mmol) were added, and stirred overnight at room temperature. The reaction compound was poured into 20 ml of water, and extracted with chloroform. The organic phase was washed with satura...

preparation example 2～ preparation example 22

[0053] According to the method of Preparation Example 1, the compounds of Preparation Example 2 to Preparation Example 22 shown below were prepared:

preparation example 2

[0054] Preparation Example 2: Preparation of oleanane-28-acid-2,11,13(18)-triene (Ia), C 30 h 44 o 2 , MS: ESI m / e436 (M + ); Rf (petroleum ether / chloroform / methanol: 4 / 4 / 0.6): 0.63, 1 H NMR (400MHz, CDCl 3 )δ: 2.51(brd, 1H, J=14.2Hz, H-19), 5.31-5.43(m, 3H, H-2, H-3, H-12), 6.35(d, 1H, J=10.4Hz , H-11).

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Abstract

The invention provides an 11-bromo-12-olefin oleanane type pentacyclic triterpene compound, which has a structure as shown in formula (1). The compound has certain inhibition tumor cell growth activity, and can be used to make drugs for preventing and curing tumor diseases. Moreover, the compound has remarkable inhibition action on mice ear tumescence caused by toluene, and can be used to make anti-inflammatory agents. The structural general formula of the 11-bromo-12-olefin oleanane type pentacyclic triterpene compound as shown in formula (1) is shown in the graph.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of December 29, 2004 and an application number of 200410102895.6. technical field [0002] The invention relates to the fields of organic chemistry and medicinal chemistry, in particular, the invention relates to polyoxidatively substituted pentacyclic triterpene derivatives, a preparation method and application thereof. The present invention treats the series of compounds on six tumor cell lines such as human prostate cancer cell (PC-3), nasopharyngeal carcinoma cell line (CNE), oral epithelial cancer cell line (KB), human lung cancer cell (A549), human liver cancer cell line (BEL-7404), human cervical cancer cells (Hela) were screened for tumor cell growth inhibitory activity. The compounds are found to have a certain activity of inhibiting the growth of tumor cells, and can be expected to be used as antitumor drugs. In addition, these compounds also have a significa...

Claims

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Application Information

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IPC IPC(8): C07J63/00A61K31/56A61P35/00A61P29/00
Inventor 赵昱冯菊红周长新白骅巫秀美
Owner ZHEJIANG UNIV
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