我们报告了带有氧杂环庚烷和苯并呋喃环系统的C 3对称星形苯基和三嗪中心核的新合成策略。在这方面,我们探索了复分解策略的应用,以市售的对羟基苯乙酮和对羟基苯甲腈为原料,通过环三聚、双键异构化和闭环复分解作为关键步骤构建 C 3对称分子。我们还通过荧光光谱数据研究了这些分子的光物理特性。除1和2外的所有化合物都显示出强荧光。
我们报告了带有氧杂环庚烷和苯并呋喃环系统的C 3对称星形苯基和三嗪中心核的新合成策略。在这方面,我们探索了复分解策略的应用,以市售的对羟基苯乙酮和对羟基苯甲腈为原料,通过环三聚、双键异构化和闭环复分解作为关键步骤构建 C 3对称分子。我们还通过荧光光谱数据研究了这些分子的光物理特性。除1和2外的所有化合物都显示出强荧光。
Phase-Transfer Catalyzed Nucleophilic Addition of Arylalkanenitrile Carbanions to Substituted Propenylarenes
作者:Wojciech Lasek、Mieczysław Makosza
DOI:10.1055/s-1993-35865
日期:——
Phenylacetonitrile and 2-phenylalkanenitriles react under phase transfer catalysis conditions with 2-propenylanisoles containing electron-withdrawing substituents (or their corresponding precursors, 2-allylanisoles) via the Michael addition pathway to give substituted 4-aryl-2-phenylbutyronitriles.
The present invention relates to novel epoxides having the formulas
1
where Y is a CO, CO
2
or SO
2
, AR is the same or different divalent unsubstituted or substituted aromatic, halogen-substituted aromatic or cyano-substituted aromatic hydrocarbon radical having from 6 to 20 carbon atoms, Z is a divalent hydrocarbon or ether radical having from 1 to 20 carbon atoms, including Y—Z—Y being CO, and R* is an alkyl, aryl, arylalkyl, alkoxy, aryloxy or arylalkoxy radical having from 0-20 carbon atoms. The epoxides of the present invention are useful in the formation of epoxy resins.
Bis(μ-oxo)–Dititanium(IV)–Chiral Binaphthyldisulfonate Complexes for Highly Enantioselective Intramolecular Hydroalkoxylation of Nonactivated Alkenes
作者:Wen-Bin Xie、Zhi Li
DOI:10.1021/acscatal.1c01146
日期:2021.5.21
A series of chiral 1,1′-binaphthyl-2,2′-disulfonic acids was designed, synthesized, and applied in a highlyenantioselective Ti-catalyzed intramolecular hydroalkoxylation of nonactivated alkenes. The catalyst is probably a complex between two chiral binaphthyldisulfonate ligands and a bis(μ-oxo)–dititanium(IV) core structure. The sulfonamide groups of the ligands and water are necessary for the catalysis
Substituent Effects on the Rate Constants for the Photo-Claisen Rearrangement of Allyl Aryl Ethers
作者:Alexandra L. Pincock、James A. Pincock、Roumiana Stefanova
DOI:10.1021/ja011981y
日期:2002.8.1
essentially identical rate constants for the excited-state processes with the exception of, the rate constant for homolytic cleavage from S(1) of the allyl ethers to give the radical pair. The difference between the fluorescence quantum yields and/or singlet lifetimes for 3 and 4 were used to obtain values of for all of the allyl ethers. These values exhibit a large substituent effect, spanning almost
Indanylacetic Acid Derivatives Carrying 4-Thiazolyl-phenoxy Tail Groups, a New Class of Potent PPAR α/γ/δ Pan Agonists: Synthesis, Structure−Activity Relationship, and In Vivo Efficacy
作者:Joachim Rudolph、Libing Chen、Dyuti Majumdar、William H. Bullock、Michael Burns、Thomas Claus、Fernando E. Dela Cruz、Michelle Daly、Frederick J. Ehrgott、Jeffrey S. Johnson、James N. Livingston、Robert W. Schoenleber、Jeffrey Shapiro、Ling Yang、Manami Tsutsumi、Xin Ma
DOI:10.1021/jm061299k
日期:2007.3.1
group derivatives that led to a new class of potent PPAR pan agonists. While most of the tail group modifications imparted potent PPAR delta agonist activity, improvement of PPAR alpha and gamma activity required the introduction of new heterocyclic substituents that were not known in the PPAR literature. Systematic optimization led to the discovery of 4-thiazolyl-phenyl derivatives with potent PPAR