The invention provides a gasoline composition which comprises a mixture of hydrocarbons of the gasoline boiling range containing an octane requirement reducing amount of an additive comprising a furan derivative containing a furyl group bearing one or more substituents comprising one or more heterocyclic and/or one or more aryl groups; a concentrate for the preparation of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.
Iodine-Promoted N-Acylation of Amines with Hydrazide: An Efficient Metal-Free Amidation
作者:Keyume Ablajan、Long Tian、Qianwei Zhang
DOI:10.1055/a-1838-9491
日期:2022.10
protocol for the amidation of hydrazide with amine has been developed by utilizing I2 as an oxidant under metal- and base-free conditions at room temperature. N-Acylation products of amines were obtained in good to excellent yields without using toxic reagents. This method is operationally straightforward and tolerates aliphatic/aromatic and primary/secondaryamines with different hydrazides.
通过在室温下在无金属和无碱条件下使用 I 2作为氧化剂,开发了一种用于酰肼与胺的酰胺化的有效方案。在不使用有毒试剂的情况下,以良好至极好的收率获得了胺的 N-酰化产物。该方法操作简单,可耐受脂肪族/芳香族和伯/仲胺与不同的酰肼。
Fuel compositions
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0795596A1
公开(公告)日:1997-09-17
This invention provides a fuel composition which comprises a major amount of a fuel boiling in the gasoline boiling range and a minor amount of an additive comprising a furan derivative containing a furyl group bearing one or more substituents comprising one or more heterocyclic and/or one or more aryl groups; an additive concentrate for addition to such fuel and a method of operating an internal combustion engine using such fuel composition. Fuels of the invention give rise to octane requirement increase control and/or octane requirement reduction effects.