A General Approach to Intermolecular Olefin Hydroacylation through Light‐Induced HAT Initiation: An Efficient Synthesis of Long‐Chain Aliphatic Ketones and Functionalized Fatty Acids
作者:Subhasis Paul、Joyram Guin
DOI:10.1002/chem.202004946
日期:2021.3
hydroacylation protocol applies to a wide array of substrates bearing numerous functional groups and many complex structural units. The reaction proves to be scalable (up to 5 g). Different functionalized fattyacids, petrochemicals and naturally occurring alkanes can be synthesized with this protocol. A radical chain mechanism is implicated in the process.
A convenient, versatile, and easy to handle intramolecular hydrofunctionalization of alkenes (C–O and C–N bonds formation) is reported using a novel niobium-based catalytic system. This atom economic and eco-friendly methodology provides an additional synthetic tool for the straightforward formation of valuable building blocks enabling molecular complexity. Various pyran, furan, pyrrolidine, piperidine
Na2S2O4/NaHCO3-system promoted addition-cyclization of per( poly)fluoroalkyl iodides or perhaloalkanes with 1,6-heptadienes
作者:Gang Zhao、Jin Yang、Wei-yuan Huang
DOI:10.1016/s0022-1139(97)00067-5
日期:1997.10
obtained using Na2S2O4/NaHCO3 promoted addition-cyclization of per(poly)fluoroalkyliodides or perhaloalkanes with 1,6-heptadienes. The stereochemistry of hydrodehalogenation products (5, 6, 8, 9) was determined based on their 1H-NMR spectra. γ-Lactams and γ-lactones bearing fluoroalkyl groups were obtained using the same system promoted per(poly)fluoroalkylation reaction with N-allyl acrylamides (10) and
报道了一种有效且实用的制备五元环化合物的合成方法。使用Na 2 S 2 O4 / NaHCO 3促进的全(聚)氟烷基碘或全卤代烷烃与1,6-庚二烯的加成环化反应,获得了带有多氟烷基的碳环和杂环五元环化合物。的加氢脱卤产物(立体化学5,6,8,9基于其测定)1 H-NMR光谱。使用与N-烯丙基丙烯酰胺(10)和丙酸烯丙酯(15)促进的全(聚)氟烷基化反应的相同系统,获得带有氟代烷基的γ-内酰胺和γ-内酯。)在相似的反应条件下。
Catalytic C−C Bond Formation Using a Simple Nickel Precatalyst System: Base‐ and Activator‐Free Direct C‐Allylation by Alcohols and Amines
作者:Joseph B. Sweeney、Anthony K. Ball、Luke J. Smith
DOI:10.1002/chem.201801241
日期:2018.5.23
A “totally catalytic” nickel(0)‐mediated method for base‐free direct alkylation of allyl alcohols and allyl amines is reported. The reaction is selective for monoallylation, uses an inexpensive NiII precatalyst system, and requires no activating reagents to be present.
A combination of a catalytic amount of a Niâphosphine complex and triethylaluminium or chlorodiethylaluminium is able to selectively cyclize a number of 1,7-heptadienes to methylidene(methyl)cyclopentanes and cyclopentenes even in cases where the dienes are prone to deallylation.