81474-47-7Relevant articles and documents
Gamma-bifendate intermediate, synthesis method thereof, and synthesis method of gamma-bifendate
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Paragraph 0016; 0045; 0048, (2021/08/07)
The invention discloses a gamma-bifendate intermediate, a synthesis method thereof, and a synthesis method of gamma-bifendate. The gamma-bifendate intermediate is 4-methoxy-5, 6-methylenedioxy-2-methoxycarbonyl phenylboronic acid, and based on the gamma-bifendate intermediate, the invention further provides a novel synthesis method of gamma-bifendate. Ullmann reaction is not adopted, and Suzuki-Miyaura reaction is introduced as a key step of asymmetric synthesis, so that synthesis is simple, isomeride does not occur, the preparation process is optimized and upgraded, reaction steps are reduced, and reaction conditions are optimized.
Nitrogen-containing biaromatic ring compounds as well as preparation method and application thereof
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, (2021/07/11)
The invention relates to nitrogen-containing biaromatic ring compounds, a preparation method and an application, namely a pharmaceutical composition consisting of the compound as an effective component, a preparation method and an application of the compound in resisting liver cancer. A series of nitrogen-containing biaromatic ring compounds with novel structures are synthesized, generation of miRNA is induced by regulating TRBP, a good anti-liver cancer effect is shown, small molecules have a relatively strong inhibiting effect on proliferation of liver cancer cells, individual compounds even have a better curative effect than enoxacin, no similar structure has the effect before, and the compounds have good development prospects.
Towards the Total Synthesis of Schisandrene: Stereoselective Synthesis of the Dibenzocyclooctadiene Lignan Core
Venkanna, Arramshetti,Poornima, Borra,Siva, Bandi,Babu, B. Hari,Babu, K. Suresh
, p. 908 - 911 (2018/02/26)
A stereoselective synthesis of the dibenzocyclooctadiene lignan core of the natural product schisandrene is described. Starting from readily available gallic acid, the synthetic strategy involves Suzuki-Miyaura cross-coupling, Stille reaction, and ring-closing metathesis (RCM) in the reaction sequence. The required asymmetric center at C-7′ was established by an asymmetric reduction of a keto compound using the Corey-Bakshi-Shibata (CBS) catalyst. In our approach, the eight-membered ring was achieved by RCM for the first time.
Nitrogen-Containing Biphenyl Compounds, Pharmaceutical Compositions of Same, Preparation Methods and Anti-HIV-1 Uses Thereof
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Paragraph 0049-0053, (2014/01/08)
Nitrogen-containing biphenyl compounds as represented by formula (I), pharmaceutically acceptable salts or derivatives thereof, pharmaceutical compositions, and preparation methods therefore, and anti-HIV-1 use of the compound. Each substituent group in formula (I) is as defined in the description.
An improved method for the synthesis of γ-DDB
Song, Chuanjun,Zhao, Peng,Hu, Zhiqiang,Shi, Shuai,Cui, Yanmei,Chang, Junbiao
supporting information; experimental part, p. 2297 - 2298 (2010/06/16)
A mild and efficient method for the synthesis γ-DDB has been developed through anhydride-linker assisted intramolecular Ullmann reaction. Highly regioselective bromination of differentially protected gallate was realized by virtue of the introduction of NBS.
Asymmetrie synthesis of (+)- and (-)-wuweizisu C stereoisomers and their chemosensitizing effects on multidrug-resistant cancer cells
Li, Yanfeng,Wang, Qiang,Dong, Lihong,Guo, Xiaohe,Wang, Wei,Xie, Jingxi,Chang, Junbiao
scheme or table, p. 3383 - 3390 (2010/02/28)
Total syntheses of the dibenzocyclooctadiene natural product wuweizisu C in its (-)-form [(S)-1] and its (+)-form [(R)-l] were achieved in 19 steps, starting from commercially available gallic acid. In the key step, the asymmetric biphenyl axis was constructed by an oxazoline-mediated Ullmann reaction to provide either the P or Mbiaryl product in 68% yield and >99% de, depending on the configuration of the oxazoline. The efficiency of this total synthesis was excellent, as the syntheses of (S)-1 and (R)-1 from, intermediate 7 each proceeded in 13 steps with an overall yield of 6.8%. (S)-1 and (R)-1 were evaluated as chemosensitizers for multidrug-resistant cancers.
Synthesis of unsymmetrical biphenyls as potent cytotoxic agents
Wu, Gang,Guo, Huan-Fang,Gao, Kun,Liu, Yi-Nan,Bastow, Kenneth F.,Morris-Natschke, Susan L.,Lee, Kuo-Hsiung,Xie, Lan
scheme or table, p. 5272 - 5276 (2009/05/07)
Twenty-six unsymmetrical biphenyls were synthesized and evaluated for cytotoxic activity against DU145, A549, KB and KB-Vin tumor cell lines. Three compounds 27, 35 and 40 showed very potent activity against the HTCL panel with an IC50 value range of 0.04-3.23 μM. In addition, fourteen active compounds were all more potent against the drug-resistant KB-Vin cell line than the parental KB cell line. Preliminary SAR analysis indicated that two bulky substituents on the 2,2′-positions of unsymmetrical biphenyl skeleton are necessary and crucial for in vitro anticancer activity, thus providing a good starting point to develop unsymmetrical biphenyls as novel anticancer agents.
Multi-functionalization of gallic acid towards improved synthesis of α- and β-DDB
Alam, Ashraful,Takaguchi, Yutaka,Ito, Hideyuki,Yoshida, Takashi,Tsuboi, Sadao
, p. 1909 - 1918 (2007/10/03)
The synthesis of mono-, di- and trisubstituted gallic acids and their ester with similar or different groups including different acetal and ketals is described. Regioselective bromination on two ortho-positions of methyl gallate, which is very crucial for many organic syntheses, was achieved in high yield and purity. The α- and β-DDB were synthesized in high overall yield and purity from the regioselective bromoderivatives.
Efficient synthesis of γ-DDB
Chang, Junbiao,Guo, Xiaohe,Cheng, Senxiang,Guo, Ruiyun,Chen, Rongfeng,Zhao, Kang
, p. 2131 - 2136 (2007/10/03)
Synthesis of γ-DDB, which is another family member of α-DDB (dimethyl 4,4′-dimethoxy-5,6,5′,6 ′- dimethylenedioxybiphenyl-2,2′- dicarboxylate), is described. The unsymmetric isomer (γ-DDB) was constructed by a linker-directed intramolecular Ullmann coupling reaction, followed by the cleavage of the linker and re-esterification.
Synthesis, separation, and theoretical studies of chiral biphenyl lignans (α- and β-DDB)
Chang, Junbiao,Chen, Rongfeng,Guo, Ruiyun,Dong, Chunhong,Zhao, Kang
, p. 2239 - 2246 (2007/10/03)
Two biphenyl lignans, α- and β-DDB (1 and 2, respectively) were efficiently synthesized without contamination by other regio-isomers. The different yields of the Ullmann coupling reactions for the synthesis of 1 and 2 were rationalized by calculating steric hindrance, stability, entropy change, and heat-of-formation values. The enantiomers of 1 and 2 were readily separated by HPLC on a chiral stationary phase. Their configurations were assigned based on the Cotton effect of the authentic natural products.