报道了一种实用简单且有用的方法,通过布朗斯台德酸催化活化源自醇的邻-[1-(对-MeO苯基)乙烯基]苯甲酸酯(PMPVB)供体来合成醚和硫醚。作用机制基于活性烯烃的远程活化,然后进行分子内 5-外触发环化,产生反应性中间体,该中间体可以通过底物依赖性 S N 1 或 S N 2 机制与醇和硫醇亲核试剂反应,从而提供容易的反应。分别获得醚和硫醚官能团。
A mild and rapid regeneration of alcohols from their allylic ethers by chlorotrimethylsilane/sodium iodide
作者:Ahmed Kamal、E. Laxman、N. Venugopal Rao
DOI:10.1016/s0040-4039(98)02314-4
日期:1999.1
A new extremely facile and efficient cleavage of allyl ethers is developed employing chlorotrimethylsilane/sodiumiodide.
利用氯代三甲基硅烷/碘化钠,开发了一种新的非常容易和高效的烯丙基醚裂解方法。
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.
Facile and Selective Cleavageof Allyl Ethers Based on Palladium(0)-Catalyzed Allylic Alkylationof<i>N</i>,<i>N</i>′-DimethylbarbituricAcid
作者:Hirokazu Tsukamoto、Yoshinori Kondo
DOI:10.1055/s-2003-39320
日期:——
The classical palladium(0)-catalyzed allylic alkylation of N,N'-dimethylbarbituric acid can be applied to the facile and selective cleavage of allylic alkyl ethers to release the corresponding alcohols in excellent yield.This reaction proceeds under neutral conditions without any additive to activate the allyl ethers and tolerates various functional groups, such as ester, ether, ketone, alkyl and aryl
Nickel-Catalyzed Removal of Alkene Protecting Group of Phenols, Alcohols via Chain Walking Process
作者:Chenkai Meng、Haolin Niu、Juehan Ning、Wengang Wu、Jun Yi
DOI:10.3390/molecules25030602
日期:——
nickel-catalyzed removal of alkene protection group under mild condition with high functional group tolerance through chain walking process has been established. Not only phenolic ethers, but also alcoholic ethers can be tolerated with the retention of stereocenter adjacent to hydroxyl group. The new reaction brings the homoallyl group into a start of new type of protectinggroup.