Oxidative transformation of cyclic ethers/amines to lactones/lactams using a DIB/TBHP protocol
作者:Yi Zhao、Jascelyn Qian Lin Ang、Angela Wan Ting Ng、Ying-Yeung Yeung
DOI:10.1039/c3ra44184a
日期:——
A novel C–H oxidation of cyclic ethers and amines to the corresponding lactones and lactams was developed using a DIB/TBHP protocol. The reaction is mild and no metallic reagent is involved. In addition, study shows that the electronic properties of the substituents could affect the selectivity of oxidation.
A straightforward synthesis of amides, ureas, and esters is reported by visible-light cross-dehydrogenating coupling (CDC) of aldehydes (or amine carbaldehydes) and amines/R-OTBS ethers by photoredoxcatalysis. The reaction is found to be general and high yielding. A plausible mechanistic pathway has been proposed for these transformations and is supported by appropriate controlled experiments.
N-iodosuccinimide mediated oxidative cyclization of mono-t-butyldimethylsilylated diols
作者:Chriss E. McDonald、Thomas R. Beebe、Mark Beard、Doug McMillen、Daniel Selski
DOI:10.1016/s0040-4039(01)80509-8
日期:1989.1
The oxidation of mono-t-butyldimethylsilylated diols is described. The t-butyldimethylsilyl moiety is useful for controlling both the direction of cyclization and the size of ring being formed.
A simple and efficient method for selective deprotection of t-butyldimethylsilyl ethers by zinc tetrafluoroborate in water
作者:Brindaban C. Ranu、Umasish Jana、Adinath Majee
DOI:10.1016/s0040-4039(99)00097-0
日期:1999.3
Selective deprotection of t-butyldimethylsilyl ethers has been achieved under mild conditions using an aqueous solution of zinc tetrafluoroborate. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.