A butenoic acid compound is defined by the following formula: ##STR1## in which Z is O,S, vinylene or azomethyne, A is an alkylene and J is phenyl or etc. It is useful to treat the heart disease.
Synthesis of Pyridines by Carbenoid-Mediated Ring Opening of 2<i>H</i>-Azirines
作者:Nicole S. Y. Loy、Alok Singh、Xianxiu Xu、Cheol-Min Park
DOI:10.1002/anie.201209301
日期:2013.2.18
a wide range of substituents on the resulting pyridinering using mild reaction conditions (see scheme; esp=α,α,α′,α′‐tetramethyl‐1,3‐benzenedipropionic acid). The formation of the key intermediate is catalyst‐controlled, and subsequent cyclization and oxidation affords pyridines in excellent yields. The method has been used for the efficient synthesis of polyarylpyridines.
Fenbufen, a New Anti-Inflammatory Analgesic: Synthesis and Structure-Activity Relationships of Analogs
作者:Ralph G. Child、Arnold C. Osterberg、Adolph E. Sloboda、Andrew S. Tomcufcik
DOI:10.1002/jps.2600660403
日期:1977.4
hundred analogs of fenbufen were prepared and tested using the carrageenan, polyarthritis, and UV erythema anti-inflammatory tests and the 2-phenyl-1,4-benzoquinone writhing and inflamed paw pressure analgesic tests. Only three retained the same full spectrum of activity as fenbufen: dl-4-(4-biphenylyl)-4-hydroxybutyric acid, dl-4-(4-biphenylyl)-1,4-butanediol, and 4-biphenylacetic acid. Fenbufen had the
Rhodium(II)-Catalyzed Cross-Coupling of Diazo Compounds
作者:Jørn H. Hansen、Brendan T. Parr、Philip Pelphrey、Quihui Jin、Jochen Autschbach、Huw M. L. Davies
DOI:10.1002/anie.201004923
日期:2011.3.7
left to chance: A convenient protocol for selective cross‐coupling of diazocompounds for the convergent synthesis of alkenes was developed (see scheme; EDG=aryl, heteroaryl, vinyl; R=O‐alkyl, aryl). The selectivity control elements were identified by ReactIR and DFT calculations and provide a framework for the design of viable diazo coupling reactions.
没事了:开发了用于重氮合成烯烃的重氮化合物选择性交叉偶联的便捷方案(见方案; EDG =芳基,杂芳基,乙烯基; R = O-烷基,芳基)。通过ReactIR和DFT计算确定了选择性控制元素,并为可行的重氮偶合反应设计提供了框架。
HFIP Solvent Enables Alcohols To Act as Alkylating Agents in Stereoselective Heterocyclization
作者:Yuxiang Zhu、Ignacio Colomer、Amber L. Thompson、Timothy J. Donohoe
DOI:10.1021/jacs.9b02198
日期:2019.4.24
method for the stereoselective synthesis of highly functionalized oxygen heterocycles using allyl or benzyl alcohols as alkylating agents is presented. The process is efficient and atom economic, generating water as the only stoichiometric byproduct. Substoichiometric amounts of Ti(OiPr)4 in HFIP solvent are key to this reactivity, and the method tolerates a broad substitution pattern on both the alcohol