1,4-Reductive Addition of Hydrazoic Acid to γ-Oxo-α,β-unsaturated δ-Lactones and -Lactams: A Convenient Route to α-Amino-γ-oxo-α,β-unsaturated δ-Lactones and -Lactams
摘要:
gamma-Oxo-alpha,beta-unsaturated delta-lactones and lactams, which are easily accessible from their corresponding 2-furylcarbinols, were used as substrates for the 1,4-reductive addition of hydrazoic acid. The outcome of the reaction is the formation, in high yields, of the corresponding alpha-amino-gamma-oxo-alpha,beta-unsaturated delta-lactones and -lactams, compounds of great biological and synthetic interest.
1,4-Reductive Addition of Hydrazoic Acid to γ-Oxo-α,β-unsaturated δ-Lactones and -Lactams: A Convenient Route to α-Amino-γ-oxo-α,β-unsaturated δ-Lactones and -Lactams
摘要:
gamma-Oxo-alpha,beta-unsaturated delta-lactones and lactams, which are easily accessible from their corresponding 2-furylcarbinols, were used as substrates for the 1,4-reductive addition of hydrazoic acid. The outcome of the reaction is the formation, in high yields, of the corresponding alpha-amino-gamma-oxo-alpha,beta-unsaturated delta-lactones and -lactams, compounds of great biological and synthetic interest.
A highly regio- and diastereoselective method to access cis-2,6-disubstituted dihydropyridinones under mild conditions by an iridium-catalyzedallylicetherification is reported. cis-2,6-Disubstituted dihydropyridinones are important precursors for the de novo synthesis of the corresponding piperidine alkaloids and iminosugars. This strategy features a broad substrate scope, high yields, and excellent
Tertiary Amine-Triggered Cascade S<sub>N</sub>2/Cycloaddition: An Efficient Construction of Complex Azaheterocycles under Mild Conditions
作者:Jian Hu、Bing Tian、Xinyan Wu、Xiaofeng Tong
DOI:10.1021/ol302329b
日期:2012.10.5
In this paper, an amine-triggeredcascade SN2/cycloaddtion sequence between 2-(acetoxymethyl)buta-2,3-dienoate 1 and various π-system functionalized tosylamides 3 has been reported, which provides a facile method for stereoselective construction of structurally diverse azaheterocycles.
在本文中,已经报道了在2-(乙酰氧基甲基)丁2,3-二烯酸酯1和各种π-系统官能化的甲苯磺酰胺3之间的胺触发级联S N 2 /环加成序列,为立体选择性构建Sn 2提供了一种简便的方法。结构上不同的氮杂杂环。
Palladium-Catalyzed Addition of Arylboronic Acids to <i>N</i>-Tosylarylimines
Pd-catalyzed addition of arylboronic acids to N-tosylarylimines was described by employing easily prepared, air-stable aminophosphine ligands, cheap inorganic base, and common organic solvents, providing diarylmethylamine derivatives through one-pot synthesis in moderate to good yields. The efficiency of this reaction was demonstrated by the compatibility with nitro, trifluoromethyl, fluoro, chloro, and methoxy groups. Moreover, rigorous exclusion of air/moisture is not required in these transformations.
Asymmetric arylation of aldimines catalyzed by heterogeneous chiral rhodium nanoparticles has been developed. The reaction proceeded in aqueousmedia without significant decomposition of the imines by hydrolysis to afford chiral (diarylmethyl)amines in high yields with outstanding enantioselectivities. This catalyst system exhibited the highest turnover number (700) in heterogeneous catalysts reported
Rhodium-catalyzed and sonication-accelerated addition of aryltin and aryllead reagents to imines in air and water
作者:Rui Ding、Cui Huo Zhao、Yong Jun Chen、Li Liu、Dong Wang、Chao Jun Li
DOI:10.1016/j.tetlet.2004.01.160
日期:2004.3
In the presence of a rhodium catalyst, imines (1a–k) react with phenyltrimethyltin 2a or phenyltrimethyllead 2b in water and air under ultrasonic irradiation at 35 °C to give the corresponding diarylmethylamines (3a–k) in good yields.