申请人:THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
公开号:US20160214097A1
公开(公告)日:2016-07-28
The invention provides simple small molecule, non-heme iron catalyst systems with broad substrate scope that can predictably enhance or overturn a Substrate Control Catalyst Control substrate's inherent reactivity preference for sp3-hybridized C—H bond oxidation. The invention also provides methods for selective aliphatic C—H bond oxidation. Furthermore, a structure-based catalyst reactivity model is disclosed that quantitatively correlates the innate physical properties of the substrate to the site-selectivities observed as a function of the catalyst. The catalyst systems can be used in combination with oxidants such as hydrogen peroxide to effect highly selective oxidations of unactivated sp3 C—H bonds over a broad range of substrates.
Highly Efficient Conversion of Alcohols to Isocyanides
作者:Yoshikazu Kitano、Kazuhiro Chiba、Masahiro Tada
DOI:10.1055/s-2001-11423
日期:——
Treatment of tertiary alcohols with silver salts (AgClO4, AgBF4, or AgOTf) and trimethylsilyl cyanide (TMSCN), followed by hydrolysis, directly affords excellent yields of corresponding isocyanides. This reaction proceeds selectively with tertiary alcohols in the presence of primary and secondary alcohols.
A one-pot reaction of alcohols with trimethylsilyl cyanide and methanesulfonic acid with subsequent neutralization by triethylamine and dehydration by tosyl chloride and pyridine gave the corresponding isocyanides in moderate-to-high yields. This method was used to synthesize tertiary and benzylic isocyanides from the corresponding alcohols. isocyanides -alcohols- Ritter reactions