Thiocyanate radical mediated dehydration of aldoximes with visible light and air
作者:Yong-Liang Ban、Jian-Ling Dai、Xiao-Ling Jin、Qing-Bao Zhang、Qiang Liu
DOI:10.1039/c9cc05354a
日期:——
We developed a new means of activating aldoximes by an in situ generated thiocyanate radical from ammonium thiocyanate and molecular oxygen at room temperature. With a catalytic amount of organic dye aizenuranine as the photocatalyst, the dehydration of aldoximes proceeds smoothly under visiblelight irradiation, providing a simple to handle, excellent functional group tolerance, and metal-free protocol
Direct conversion of aldehydes into nitriles via O-phenylcarbamoylated aldoximes
作者:Necdet Coşkun、Nevin Arikan
DOI:10.1016/s0040-4020(99)00692-4
日期:1999.10
hydroxylamine tosylate reacts with aldehydes at room temperature to give the corresponding O-carbamoylated oximes. The reaction of carbamoylated hydroxylamine with aromatic aldehydes in THF or in toluene at reflux affords the corresponding nitriles and anilinium tosylate in high yield. Attempts to cyclize compounds 2 in the presence of AcCl lead again to the formation of nitriles.
MTO catalyzed oxidation of aldehyde N,N-dimethylhydrazones with hydrogen peroxide: high yield formation of nitriles and N-methylene-N-methyl N-oxide
作者:Henri Rudler、Bernard Denise
DOI:10.1039/a804839h
日期:——
N,N-Dimethylhydrazones of aldehydes react with hydrogen peroxide at –50 °C in the presence of catalytic amounts of methyltrioxorhenium (MTO) to give in high yield the corresponding nitriles and N-methylene-N-methyl N-oxide.
A simple and efficient method for the synthesis of new chiral polyaza heterocylic structures containing pyridines and 1,3-pyrimidine units has been developed. It is based on the reaction of the appropriate enaminones with optically pure carboxamidine derived from the commercially available (R)-(−)-myrtenal.