Novel Oxidative α-Tosyloxylation of Alcohols with Iodosylbenzene and p-Toluenesulfonic Acid and Its Synthetic Use for Direct Preparation of Heteroaromatics
摘要:
alpha-Tosyloxyketones and alpha-tosyloxyaldehydes were directly prepared from alcohols by treatment with iodosylbenzene and p-toluenesulfonic acid monohydrate in good yields. This method can be used for the direct preparation of thiazoles, imidazoles, and imidazo[1,2-alpha]pyridines from alcohols in good to moderate yields by the successive treatment with iodosylbenzene and p-toluenesulfonic acid monohydrate, followed by thioamides, benzamidine, and 2-aminopyridine, respectively.
Reactivities of Novel [Hydroxy(tosyloxy)iodo]arenes and [Hydroxy(phosphoryloxy)iodo]arenes for α-Tosyloxylation and α-Phosphoryloxylation of Ketones
作者:Takahiro Nabana、Hideo Togo
DOI:10.1021/jo0200670
日期:2002.6.1
[hydroxy(tosyloxy)iodo]arenes bearing 2-thienyl, 3-thienyl, N-tosyl-4-pyrazolyl, 3-trifluoromethylphenyl, and 3,5-bis(trifluoromethy)phenyl as an aromatic group, and [hydroxy(phosphoryloxy)iodo]arenes bearing N-tosyl-4-pyrazolyl, 3-trifluoromethylphenyl, and 3,5-bis(trifluoromethy)phenyl as an aromatic group, were prepared. alpha-Tosyloxylation and alpha-phosphoryloxylation of ketones with these compounds were
An Efficient Microwave-Promoted Solvent-Free α-Phosphoryloxylation of Ketones
作者:Ye Pu、Yingguo Fang、Jie Yan
DOI:10.2174/157017812802139717
日期:2012.7.1
An efficient solvent-free α-phosphoryloxylation of ketones under microwave irradiation is reported. When ketones
reacted with phosphates and (diacetoxyiodo)benzene under microwave irradiation for short time, the α-phosphoryloxylaction of ketones was easily be carried out and the corresponding ketol phosphates were prepared in moderate
to good yields.