期刊文献+

二次检索

题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

年份

共找到2篇文章
< 1 >
每页显示 20 50 100
DDQ/TFA: an Efficient Nonmetallic Reagent System for the Oxidative Coupling to Construct Phenanthrene Rings 被引量:1
1
作者 LI Ling HU Yanna WANG Kailiang WANG Qingmin 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2014年第4期619-623,共5页
A mild synthetic method of a series of phenanthrenes with different substituents on the phenanthrene ring is described.The method involves intramolecular oxidative coupling with 2,3-dichloro-5,6-dicyanobenzoquinone (... A mild synthetic method of a series of phenanthrenes with different substituents on the phenanthrene ring is described.The method involves intramolecular oxidative coupling with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ)/trifluoroacetic acid(TFA) as oxidant to produce phenanthrenes in high yields and is fit for large-scale preparation.Furthermore,DDQ can be regenerated by a simple oxidation.The present approach solves a key step for the synthesis of polycyclic structures related to an alkaloid tylophorine. 展开更多
关键词 Intramolecular oxidative coupling 2 3-dichloro-5 6-dicyanobenzoquinone(ddq 1 2-Diarylethylene Phenanthrene ring ALKALOID
原文传递
A New Approach to the Synthesis of Bergapten
2
作者 CAI Xiaoqing JI Dongxin +2 位作者 LIU Jiageng HU Maolin JIN Zhimin 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2022年第6期1492-1496,共5页
In this study, bergapten was synthesized in a yield of 55% from phloroglucinol as starting material, via a novel approach including monomethylation, Hoesch reaction, acetylation, deacetoxylation, Pechmann condensation... In this study, bergapten was synthesized in a yield of 55% from phloroglucinol as starting material, via a novel approach including monomethylation, Hoesch reaction, acetylation, deacetoxylation, Pechmann condensation and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone(DDQ) dehydrogenation. With the adoption of the acetylation of enol tautomer, the deacetoxylation and the DDQ dehydrogenation, the novel approach differs greatly from the processes reported previously, though the starting material was the same or similar to those used on previous synthetic processes. The newly adopted reaction underwent easily, affording all reactions in high yields, especially acetylation and deacetoxylation and DDQ dehydrogenation in almost quantitative yields, ensuring a final yield higher than those previously reported. 展开更多
关键词 BERGAPTEN Enol tautomerism Acetylation Deacetoxylation 2 3-dichloro-5 6-dicyano-1 4-benzoquinone (ddq)dehydrogenation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部