A series of novel podophyllotoxin (PDT) analogues was synthesized in which the lactone moiety was shifted to C ring. Some of the derivatives were also synthesized with modified A ring. Analogues 23 and 25 exhibited potent in vitro cytotoxicity against colon cancer (CaCO2) cell line. p-Demethylated E-ring analogues exhibited better potency than the corresponding methylated analogues. These analogues showed toxicity comparable to PDT against human erythrocytes albeit at much higher concentrations (100 μg/ml) than their cytotoxicity values.
Synthesis and antimicrobial activities of 4-aryl-3,4-dihydrocoumarins and 4-arylcoumarins
作者:Jie Sun、Wei-Xian Ding、Xiao-Ping Hong、Ke-Yun Zhang、Yong Zou
DOI:10.1007/s10600-012-0149-9
日期:2012.3
A new series of 4-aryl-3,4-dihydrocoumarins and 4-arylcoumarins were synthesized by the reaction of substituted cinnamic acids and 3-arylpropiolic acid with the corresponding phenols. These compounds were evaluated for antibacterial activity in vitro. The synthesized compounds displayed different degrees of antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Bacillus dysenteriae, and Candida albicans (a fungus). Compounds with catechol moieties and 7,8-substituted dihydroxyls in the A ring were the most active antimicrobial agents.
Substituted 4h-chromens, 2h-chromenes, chromans and analogs as activators of caspases and inducers of apoptosis and the use thereof
申请人:Cai Xiong Sui
公开号:US20050176750A1
公开(公告)日:2005-08-11
The present invention is directed to substituted 4H-chromenes, 2H-chromenes, chromans and analogs thereof, represented by the general Formula (I) wherein R
5
, A, B, X, Y, Z and dotted lines are defined herein. The present invention also relates to the discovery that compounds having Formula (I) are activators of caspases and inducers of apoptosis. Therefore, the activators of caspases and inducers of apoptosis of this invention can be used to induce cell death in a variety of clinical conditions in which uncontrolled growth and spread of abnormal cells occurs.
Synthesis of Substituted (±)-3,4-Dihydrocoumarins Using H-Y Zeolite
作者:Manojkumar R. Shukla、Prashant N. Patil、Prakash P. Wadgaonkar、Prafulla N. Josh、Manikrao M. Salunkhe
DOI:10.1080/00397910008087290
日期:2000.1
Synthesis of substituted (+/-)-3,4 Dihydrocoumarins were prepared with the reaction between substituted cinnamic acid and phenol catalysed by eco-friendly solid-acid catalyst H-Y zeolite involving esterification followed by ring closure.
Shukla; Padiya; Patil, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1999, vol. 38, # 3, p. 372 - 375