【摘 要】
：
A simple and facile synthesis of 14-aryl and alkyl-14H-dibenzo[a,j]xanthenes and 1,8-dioxooctahydroxanthene derivatives has been successfully developed by treat
【机 构】
：
Chemistry Department,Ayatollah Amoli Branch,Islamic Azad University,
论文部分内容阅读
A simple and facile synthesis of 14-aryl and alkyl-14H-dibenzo[a,j]xanthenes and 1,8-dioxooctahydroxanthene derivatives has been successfully developed by treatment of β-naphthol or dimedone with aldehydes under mild conditions in the presence of a pentafluorophenyl ammonium triflate(PFPAT) organocatalyst.These catalytic condensation reactions represent green chemical processes and the PFPAT organocatalyst is air-stable,cost-effective,easy to handle,and easily removed from the reaction mixtures.
A simple and facile synthesis of 14-aryl and alkyl-14H-dibenzo [a, j] xanthenes and 1,8-dioxooctahydroxanthene derivatives has been successfully developed by treatment of β-naphthol or dimedone with aldehydes under mild conditions in the presence of a pentafluorophenyl ammonium triflate (PFPAT) organocatalyst. These catalytic condensation reactions represent green chemical processes and the PFPAT organocatalyst is air-stable, cost-effective, easy to handle, and easily removed from the reaction mixtures.
其他文献
利用偏最小二乘法将婴儿乳粉的近红外光谱技术(NIRS)数据与多不饱和脂肪酸含量建立校正模型,并通过交互验证和外部检验2种方式来考察模型的可靠性。选择不同的波长范围和采用
本刊讯日前,北京市昌平区食品药品监督管理局的执法人员对太阳城社区群众,组织开展了家庭用药知识培训活动。为确保培训能够取得实效,执法人员将培训分为三个环节进行。一是
目的:研究漆姑草醇提物(HSJ)对人白血病细胞株HL-60细胞凋亡相关蛋白表达的影响,探讨其诱导凋亡的分子机制。方法:采用不同浓度的HSJ作用HL-60细胞后,Hoechst 33258荧光染色
小号的演奏法分为吐音和连音两大类。其中连音演奏法的学习和训练是一个系统而复杂的过程,尤其是对气息、嘴型、肌肉的要求都是十分严格的。从气息的重要作用中引申出与演奏
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
黄河三门峡水库的建成在防洪、发电、供水等方面都发挥了巨大的效益,但由于库岸受水库蓄水、库岸地质等条件的影响,库岸工程汛期经常出现险情。本文浅析了库区工程出险及塌岸
新华社宜宾11月26日电继三峡工程、溪洛渡水电站之后我国第三大水电站—向家坝水电站26日正式开工建设。中共中央政治局委员、国务院副总理曾培炎出席开工仪式并宣布正式开工
The graft copolymerization of acrylic acid(AA) onto polyethylene glycol terephthalate(PET) fiber initialed by benzoy peroxide (BPO) was carried out in heterogen
分析了江苏水利工程建设推广应用预拌混凝土的必要性和可行性，提出了水利建设各阶段推广应用预拌混凝土的基本程序和要求，针对水利工程对混凝土的特殊要求，给出了水利建设工程应
建立同时测定茄根中2种苯丙酰胺类成分N-反式-对香豆酰基去甲辛弗林和N-反式-对香豆酰基酪胺含量的高效液相色谱方法。采用Agilent Eclipse XDB C18色谱柱(4.6 mm×250 mm,5