S-Benzyl-N,N′-diphenyl Isothiouronium Iodide as an Efficient Organocatalyst for the Transfer Hydrogenation of 1,4-Benzoxazines

被引:0
作者
Kang, Sungmin [1 ]
Yeo, Hyoung Min [1 ]
Kim, Taek Hyeon [1 ]
机构
[1] Chonnam Natl Univ, Coll Engn, Sch Chem Engn, Gwangju 61186, South Korea
来源
CHEMISTRYSELECT | 2022年 / 7卷 / 04期
基金
新加坡国家研究基金会;
关键词
Isothiouronium salt; organocatalyst; hydrogenation; 1; 4-benzoxazines; 3; 4-dihydro-2H-1; 4-benzoxazine; DIRECT REDUCTIVE AMINATION; ASYMMETRIC HYDROGENATION; BRONSTED ACID; ENANTIOSELECTIVE HYDROGENATION; HANTZSCH ESTERS; ALDEHYDES; CATALYSTS;
D O I
10.1002/slct.202103392
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
This study reports on the isothiouronium salt catalyzed transfer hydrogenation of various 3-substituted-2H-1,4-benzoxazines, with Hantzsch esters as a hydrogen source. Transfer hydrogenation of 1,4-benzoxazines has been successfully carried out with small amount of 1 mol% S-benzyl-N,N '-diphenyl isothiouronium iodide as a catalyst. Various 3,4-dihydro-2H-1,4-benzoxazines were obtained in quantitative yield at room temperature.
引用
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页数:4
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