Bioactive Rearranged and Halogenated Semisynthetic Derivatives of the Marine Natural Product Sarcophine
作者:Swapnali S. Sawant、Paul W. Sylvester、Mitchell A. Avery、Prashant Desai、Diaa T. A. Youssef、Khalid A. El Sayed
DOI:10.1021/np0497393
日期:2004.12.1
using Hg(OAc)2 and NaBH4 afforded four new rearranged and hydroxylated products. Bromination of sarcophine with N-bromosuccinimide (NBS) furnished two new brominated and rearranged products. Reaction with iodine gave the known iso-sarcophinone and (+)-sarcophytoxin B. Structure elucidation was based on a combination of transition state modeling, molecular dynamics, mechanistic considerations, and 2D
萜类是具有14元大环的天然二萜。从松树油性树脂中分离出最简单的天然斜柏酸酯((+)-cembrene)。石藻A和B是抑制肿瘤促进的已知的类脑膜。Sarcophine是一种从红海软珊瑚Sarcophyton glaucum中分离出的相关类斜方生物。据报道,Sarcophine及其生物转化产物和半合成衍生物具有癌症化学预防活性。使用Hg(OAc)2和NaBH4进行氧水杨酸脱汞,得到了四种新的重排和羟基化产物。用N-溴代琥珀酰亚胺(NBS)溴化茶树碱提供了两种新的溴化和重排产品。与碘反应,得到了已知的异肌红蛋白酮和(+)-肌藻毒素B。结构解析是基于过渡态建模,分子动力学,机械方面的考虑因素和2D NMR数据。还报道了新产品的抗增殖活性。