Intramolecular Hydroamination of Alkynes Catalyzed by Pd(PPh3)4/Triphenylphosphine under Neutral Conditions
摘要:
The intramolecular hydroamination of alkynes tethered with amino group 1 in the presence of catalytic amounts of Pd(PPh3)(4) and PPh3 in benzene at 100 degrees C proceeded smoothly without the use of any additional acid source to afford five and six-membered nitrogen heterocycles 2 in good to excellent yields. A compulsory addition of carboxylic acid as a cocatalyst was not needed, and the reaction could be carried out under essentially neutral conditions.
Intramolecular Hydroamination of Alkynes Catalyzed by Pd(PPh3)4/Triphenylphosphine under Neutral Conditions
摘要:
The intramolecular hydroamination of alkynes tethered with amino group 1 in the presence of catalytic amounts of Pd(PPh3)(4) and PPh3 in benzene at 100 degrees C proceeded smoothly without the use of any additional acid source to afford five and six-membered nitrogen heterocycles 2 in good to excellent yields. A compulsory addition of carboxylic acid as a cocatalyst was not needed, and the reaction could be carried out under essentially neutral conditions.
Synthesis of Eight‐Membered Nitrogen Heterocycles via a Heterogeneous PtI
<sub>2</sub>
‐Catalyzed Cascade Cycloaddition Reaction of δ‐Aminoalkynes with Electron‐Deficient Alkynes
作者:Xinhong Li、Songmeng Wang、Hongkai Wang、Weilin Wang、Lingyan Liu、Weixing Chang、Jing Li
DOI:10.1002/adsc.201901644
日期:2020.4.8
cascade reaction of δ‐aminoalkynes was developed for the synthesis of various eight‐membered nitrogen heterocycles in excellent yields. The reaction proceeds via a hydration of δ‐aminoalkynes and subsequent intramolecular cyclization and intermolecular addition as well as ring‐expansion cascade reaction with another electron‐deficient alkynes. This method has the advantages of simple operation and mild
Palladium/Benzoic Acid Catalyzed Hydroamination of Alkynes
作者:Isao Kadota、Akinori Shibuya、Leopold Mpaka Lutete、Yoshinori Yamamoto
DOI:10.1021/jo990498r
日期:1999.6.1
Lutete, Leopold Mpaka; Kadota, Isao; Shibuya, Akinori, Heterocycles, 2002, vol. 58, p. 347 - 357
作者:Lutete, Leopold Mpaka、Kadota, Isao、Shibuya, Akinori、Yamamoto, Yoshinori
DOI:——
日期:——
Intramolecular Hydroamination of Alkynes Catalyzed by Pd(PPh<sub>3</sub>)<sub>4</sub>/Triphenylphosphine under Neutral Conditions
作者:Gan B. Bajracharya、Zhibao Huo、Yoshinori Yamamoto
DOI:10.1021/jo050412w
日期:2005.6.1
The intramolecular hydroamination of alkynes tethered with amino group 1 in the presence of catalytic amounts of Pd(PPh3)(4) and PPh3 in benzene at 100 degrees C proceeded smoothly without the use of any additional acid source to afford five and six-membered nitrogen heterocycles 2 in good to excellent yields. A compulsory addition of carboxylic acid as a cocatalyst was not needed, and the reaction could be carried out under essentially neutral conditions.