A cyanide‐free platform technology for the synthesis of chiral nitriles by biocatalytic enantioselective dehydration of a wide range of aldoximes is reported. The nitriles were obtained with high enantiomeric excess of >90 % ee (and up to 99 % ee) in many cases, and a “privileged substrate structure” with respect to high enantioselectivity was identified. Furthermore, a surprising phenomenon was observed
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 synthesis of nitriles from aldehydes with hydroxylamine-O-sulfonic acid in acidic water
作者:Dylan J. Quinn、Graham J. Haun、Gustavo Moura-Letts
DOI:10.1016/j.tetlet.2016.07.047
日期:2016.8
Herein is reported the selective transformation of aldehydes to nitriles in the presence of hydroxylamine-O-sulfonic acid (NH2OSO3H) as a source of the N atom and acidic water. The reaction works with high yields for a large array of aromatic and aliphatic aldehydes, as well as hindered aldehydes and conjugated aldehydes without purification. The reaction conditions are very mild and tolerate a wide
本文报道了在作为N原子源和酸性水的羟胺-O-磺酸(NH 2 OSO 3 H)存在下醛选择性地转化为腈。该反应对于大量芳族和脂族醛以及受阻醛和共轭醛无需纯化即可高产率地进行。反应条件非常温和,可以耐受各种官能团。原则上,反应可以在醋中完成。
2-Methyl-3-(p-methyl-phenyl)-propionitril, dessen Herstellung und Verwendung als Riechstoff
申请人:BASF Aktiengesellschaft
公开号:EP0270841A2
公开(公告)日:1988-06-15
2-Methyl-3-(p-methyl-phenyl)propionitril, dessen Herstellung und Verwendung als Riechstoff.
The present invention provides a method for producing a nitrile represented by general formula (1) (in the formula, R denotes an optionally substituted alkyl group, alkenyl group, dienyl group, aralkyl group or aryl group having a total of 3-20 carbon atoms), and the method includes heating an aldoxime represented by general formula (2) (in the formula, R denotes the same groups as those mentioned above) at 80-250°C in the presence of an alkali metal or alkaline earth metal salt of phosphoric acid (catalyst A) and distilling off water generated as the reaction progresses to outside the reaction system.