A Transition-Metal-Free One-Pot Cascade Process for Transformation of Primary Alcohols (RCH<sub>2</sub>
OH) to Nitriles (RCN) Mediated by SO<sub>2</sub>
F<sub>2</sub>
作者:Ying Jiang、Bing Sun、Wan-Yin Fang、Hua-Li Qin
DOI:10.1002/ejoc.201900478
日期:2019.6.2
A new transition‐metal‐free one‐pot cascade process for the direct conversion of alcohols to nitriles was developed without introducing an “additional carbon atom”. This protocol allows transformations of readily available, inexpensive, and abundant alcohols to highly valuable nitriles.
Cascade Process for Direct Transformation of Aldehydes (RCHO) to Nitriles (RCN) Using Inorganic Reagents NH<sub>2</sub>OH/Na<sub>2</sub>CO<sub>3</sub>/SO<sub>2</sub>F<sub>2</sub> in DMSO
作者:Wan-Yin Fang、Hua-Li Qin
DOI:10.1021/acs.joc.8b03164
日期:2019.5.3
and practical process for direct conversion of aldehydes to nitriles was developed feathering a wide substrate scope and great functional group tolerability (52 examples, over 90% yield in most cases) using inorganic reagents (NH2OH/Na2CO3/SO2F2) in DMSO. This method allows for transformations of readily available, inexpensive, and abundant aldehydes to highly valuable nitriles in a pot, atom, and
使用无机试剂(NH 2 OH / Na 2 CO )开发了一种简单,温和且实用的方法,将醛直接转化为腈,可在较宽的底物范围内实现出色的官能团耐受性(52个实例,大多数情况下产率超过90%)3 / SO 2 F 2)在DMSO中。该方法允许以易用,原子和步经济的方式将易于获得,廉价且丰富的醛转化为高度有价值的腈,而无需过渡金属。该协议将作为将氰基部分安装到复杂分子的强大工具。
Clickable Transformation of Nitriles (RCN) to Oxazolyl Sulfonyl Fluoride Warheads
synthesis of oxazolyl sulfonyl fluorides was developed through Rh2(OAc)4-catalyzed annulation of methyl-2-diazo-2-(fluorosulfonyl)acetate (MDF) or its ethyl ester derivative with nitriles. This practical method provides a general and direct route to a unique class of highly functionalized oxazolyl-decorated sulfonyl fluoride warheads with great potential in medicinal chemistry, chemical biology, and drug
Reactions de wittig, wittig-horner et knoevenagel par activation anionique avec l'alumine ou le fluorure de potassium depose sur l'alumine, sans solvant
Palladium-Catalyzed α,β-Dehydrogenation of Esters and Nitriles
作者:Yifeng Chen、Justin P. Romaire、Timothy R. Newhouse
DOI:10.1021/jacs.5b02243
日期:2015.5.13
A highly practical and general palladium-catalyzed methodology for the alpha,beta-dehydrogenation of esters and nitriles is repotted. Generation of a zinc enolate or (cyanoalkyl)zinc species followed by the addition of an allyl oxidant and a palladium catalyst results in synthetically useful yields of alpha,beta-unsaturated esters, lactones, and nitriles. Preliminary mechanistic investigations are consistent with reversible beta-hydride elimination and turnover-limiting, propene-forming reductive elimination.