已经实现了一种通过分子内无受体脱氢偶联合成多种二氢异喹啉[ 2,1- a ]喹唑啉酮、2-芳基喹唑啉酮和类似物的简单、高效和清洁的方法。双(2-甲氧基乙基)醚和分子氧的组合被确定为这种氧化脱氢偶联顺序转化的高效体系,无需外部引发剂、催化剂和添加剂。通过29个例子的范围和克级反应证明了其适用性和实用性。还进行了一些对照实验以支持可能的反应途径。
Synthesis of rutaecarpine alkaloids <i>via</i> an electrochemical cross dehydrogenation coupling reaction
作者:Qian-Yu Li、Shi-Yan Cheng、Hai-Tao Tang、Ying-Ming Pan
DOI:10.1039/c9gc03028j
日期:——
Substrates are directly oxidized at the anode without using any metal catalyst and oxidant to obtain a series of nitrogen heterocyclic compounds, including benzimidazoles and quinolinones. These compounds are highly tolerant to various functional groups and heterocycle-containing substrates. In addition, natural alkaloids, such as rutaecarpine and deoxyvasicinone, can be synthesized by this method
Compounds having antiestrogenic and tissue selective estrogenic properties, and compounds with anti-androgenic properties for treatment of prostate cancer and androgen receptor dependent diseases
申请人:Danso-Danquah Richmond
公开号:US20060287359A1
公开(公告)日:2006-12-21
Compounds for the treatment of estrogen-receptor related maladies are provided. Compounds with anti-androgenic properties also are provided. In particular, the invention provides compounds that are tetrahydroquinoline phenylamide derivatives and are useful for the treatment of breast and prostate cancer, and osteoporosis.
Click-binol-phosphoric acid catalysts in intramolecular enantioselective oxidative C H-bond functionalization
作者:Sebastian Stockerl、Daniel Gutiérrez、Olga García Mancheño
DOI:10.1016/j.molcata.2016.09.006
日期:2017.1
Counteranion-catalysis represents an appealing but challenging approach for the development of enantioselective oxidative C-H bond functionalization reactions. In this work, a new family of 3,3'-triazolyl BINOL-derived phosphoric acids was synthesized and employed in the intramolecular asymmetric C-H bond functionalization of N-aryl substituted tetrahydroisoquinolines. As previously reported with related structures, the presence of the triazole groups on the catalysts was key to attain enantioselectivity. Our study also shows the importance of choosing the appropriate regioisomeric triazole groups at the BINOL backbone to achieve a more efficient chirality transfer. Moderate enantiomeric ratios were obtained with the N-benzamide substrates, whereas the change of the nature of the nucleophile fragment was translated to a dramatic loss of the enantioselectivity. Therefore, it can be foreseen that there is a need for designing further superior catalyst structures to develop future counter-anion organocatalyzed asymmetric C-H bond functionalization reactions. (C) 2016 Elsevier B.V. All rights reserved.
Efficient Construction of CN Double Bonds<i>via</i>Acceptorless Dehydrogenative Coupling
作者:Xiang Sun、Yu Hu、Shao-zhen Nie、Yun-yun Yan、Xue-jing Zhang、Ming Yan
DOI:10.1002/adsc.201300455
日期:2013.8.12
AbstractThe efficient construction of CN double bonds has been achieved by the Ir‐catalyzed intramolecular acceptorless dehydrogenative cross‐coupling of tertiary amines and amides. An iridium/2‐hydroxypyridine complex was identified as the highly efficient catalyst. A number of quinazolinone derivatives was prepared in excellent yields. An iridium‐mediated CH activation mechanism is proposed. This finding provides an unprecedented strategy for the direct imidation of sp3 CH bonds.magnified image