Fluoride ion-catalyzed conjugate addition for easy synthesis of 3-sulfanylpropionic acid from thiol and α,β-unsaturated carboxylic acid
摘要:
3-Sulfanylpropionic acids are obtained in excellent yields by proceeding through a simple, mild, and efficient procedure utilizing tetrabutylammonium fluoride (TBAF) as catalyst. (C) 2007 Published by Elsevier Ltd.
Rh-Catalyzed Conjugate Addition of Arylzinc Chlorides to Thiochromones: A Highly Enantioselective Pathway for Accessing Chiral Thioflavanones
作者:Ling Meng、Ming Yu Jin、Jun Wang
DOI:10.1021/acs.orglett.6b02453
日期:2016.10.7
A highly efficient asymmetric synthesis of chiral thioflavanones is developed via conjugateaddition of arylzinc reagents to thiochromones using Rh(COD)Cl2/(R)-3,4,5-MeO-MeOBIPHEP catalyst. This method overcomes catalyst poisoning and substrate inertness and affords a series of chiral thioflavanones (2-arylthiochroman-4-ones) in good yields (up to 91% yield) with excellent ee values (up to 97% ee)
Cu-Catalyzed Conjugate Addition of Grignard Reagents to Thiochromones: An Enantioselective Pathway for Accessing 2-Alkylthiochromanones
作者:Qingxiong Yang、Jun Wang、Shihui Luo、Ling Meng
DOI:10.1055/s-0037-1610225
日期:2018.9
The enantioselective incorporation of alkyl groups in thiochromones was realized for the first time by a Cu/(R,S)-PPF-P t Bu2-catalyzed conjugate addition of Grignardreagents to thiochromones. With this method, a series of 2-methylthiochromanones were obtained in good yields (up to 96% yield) with moderate-to-good ee values (up to 87% ee). The established method expedites the synthesis of a large
通过Cu/(R,S)-PPF-P t Bu2 催化的格氏试剂与硫色酮的共轭加成,首次实现了烷基在硫色酮中的对映选择性掺入。使用这种方法,以良好的收率(最高 96% 的收率)获得了一系列 2-甲基硫代色满酮,其 ee 值中等至良好(最高 87% ee)。已建立的方法加速了大型手性硫代色满酮库的合成,以用于进一步的合成应用和生物学研究。
Development of Conjugate Addition of Lithium Dialkylcuprates to Thiochromones: Synthesis of 2-Alkylthiochroman-4-ones and Additional Synthetic Applications
Lithium dialkylcuprates undergo conjugateaddition to thiochromones to afford 2-alkylthiochroman-4-ones in good yields. This approach provide an efficient and general synthetic approach to privileged sulfur-containing structural motifs and valuable precursors for many pharmaceuticals, starting from common substrates-thiochromones. Good yields of 2-alkyl-substituted thiochroman-4-ones are attained with
Cu(I)-Catalyzed Enantioselective Alkynylation of Thiochromones
作者:Ling Meng、Ka Yan Ngai、Xiaoyong Chang、Zhenyang Lin、Jun Wang
DOI:10.1021/acs.orglett.0c00005
日期:2020.2.7
A highly efficient asymmetric synthesis of chiral thiochromanones is developed via Cu(I)/phosphoramidite catalyzed asymmetric alkynylation of thiochromones under mild reaction conditions. The catalyst system is tolerant of various thiochromone precursors and terminal alkynes. The established asymmetrictransformation provides different enatiomeric-enriched thiochromanones with more molecular complexity
Provided herein are novel and useful compounds having a tryptase inhibition activity, pharmaceutical compositions comprising such compounds, and methods treating subjects suffering from a condition, disease, or disorder that can be ameliorated by the administration of an inhibitor of tryptase, e.g., asthma and inflammatory diseases, to name only a few.