An efficient method for carbon–nitrogen bond formation between ally silyl ethers and N , N -acyltosylhydrazine was developed under very mild conditions using 2 mol% of mercuric triflate [Hg(OTf) 2 ] as a catalyst. This method does not require the use of any ligand system or supplementary additives and is applicable to the preparation of various N -allylhydrazides with good to excellent yields.
使用 2 mol% 的三氟甲磺酸汞 [Hg(OTf) 2 ] 作为催化剂,在非常温和的条件下开发了一种在烯丙基甲硅烷基醚和 N , N - 酰基甲苯基肼之间形成碳 - 氮键的有效方法。该方法不需要使用任何配体系统或辅助添加剂,适用于制备各种N-烯丙基酰肼,收率良好。
A <i>gem</i>‐Dibromocyclopropane Ring‐Expansion/Mizoroki‐Heck Cyclisation Route to Tetrahydrodibenzofurans
作者:Nan Hu、Yu Chen、Yu‐Qi Zhang、Ping Lan、Ya‐Jian Hu、Jas S. Ward、Michael G. Gardiner、Martin G. Banwell
DOI:10.1002/ejoc.202400038
日期:2024.3
Readily accessible and oxygenated 6,6-dibromobicyclo[3.1.0]hexanes undergo ring-opening/nucleophilic trapping reactions with isovanillin to afford adducts that can be engaged in intramolecular Mizoroki-Heck reactions to give tetrahydrodibenzofurans. Variations in the manner in which the first step of the reaction sequence is carried out can be used to alter the regio- and stereo-chemical forms of both