Alkylene and Alkylidene Phenylacetonitriles and Derivatives. 1-Phenyl-2-ethylcyclopropanecarbonitrile, α-Phenyl-β-ethylacrylonitrile and α-Phenyl-β-isopropylacrylonitrile1
使用DMSO中的无机试剂NH 2 OH / Na 2 CO 3 / SO 2 F 2将醛(RCHO)直接转化为腈(RCN)的级联过程
摘要:
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。
The palladium(0)-catalyzed condensation of aryl halides with the sodium salts of phenylsulfonylacetonitrile and diethyl cyanomethylphonate in dimethoxyethane gave the corresponding α-phenylsulfonylareneacetonitriles and diethyl arylcyanomethylphosphonates in good yields.The α-phenylsulfonylareneacetonitriles were easily desulfonylated with zinc to give the areneacetonitriles, and the arylcyanomethylphonates were converted to the alkylideneareneacetonitriles by means of the Horner-Emmons reaction.
corresponding chiral 2,3-disubstituted-1-indanols 2 by ruthenium(II)-catalyzed dynamic kinetic resolution–asymmetric transfer hydrogenation. In particular, this route offers a practical access to a new class of conformationally rigid enantiopure 1,4-diols 2k–m having four contiguous chiral centers. Transformation of ent-2k into a Pallidol analogue via a highly diastereo- and regioselective Friedel–Crafts
Synthesis of Aryloxiranes and Arylcyclopropanes via Deprotonation of Benzyl Chlorides
作者:Rafał Loska、Mieczysław Mąkosza、Kacper Kisiel
DOI:10.1055/s-0040-1719895
日期:2022.5
Upon the action of strong bases at low temperature, benzyl chloride and its ring-substituted derivatives undergo deprotonation at the benzylic position and the produced carbanions react with aldehydes, ketones and Michael acceptors to form aryl oxiranes and cyclopropanes.
Antispasmodics. II. Substituted α-(β-Aminoethyl)-phenylacetonitriles and 3-Phenylpropylamines
作者:A. Wayne Ruddy
DOI:10.1021/ja01153a013
日期:1951.9
Direct Synthesis of α,β-Unsaturated Nitriles in Solid/Liquid Heterogeneous Medium
作者:F. Ladhar、R. El Gharbi
DOI:10.1080/00397919108016764
日期:1991.2
alpha,beta-unsaturated nitriles are obtained with high yields by condensation of diversely substituted aldehydes using nitriles in the presence of K2CO3. These basic active species avoids aldolisation generally observed in this type of reaction.