Selective electrolytic fluorinations in 70% HF/30% pyridine
作者:Sarah M. Lee、Jamie M. Roseman、C. Blair Zartman、Eamonn P. Morrison、Sean J. Harrison、Corrie A. Stankiewicz、W.J. Middleton
DOI:10.1016/0022-1139(95)03379-3
日期:1996.3
The selectivefluorination of compounds containing benzylic hydrogen atoms was accomplished by electrolysis in a mixture of 70% HF and 30% pyridine (Olah's reagent) using a square wave alternating current (1.76–2.75 V, 0.02–0.05 Hz) and Pt electrodes. This method can be used in the laboratory to prepare conveniently gram-size quantities of monofluorinated products. An ion radical mechanism has been
There are provided compounds of formula I
or a pharmaceutically acceptable salt thereof,
wherein X, Y, R
1
, R
1′
, R
2
, R
2′
, R
3
, R
4
, R
5
are as defined herein. The compounds exhibit activity as anticancer agents.
Mono et difluoration electrochimiques de groupes benzyliques
作者:Eliane Laurent、Bernard Marquet、Robert Tardivel
DOI:10.1016/s0040-4020(01)89079-7
日期:——
a fluorinating reagent allowed to introduce a fluorine atom in α position of electron withdrawing group via carbocation + (ECBECN mechanism). Whatever the E group monofluorides are obtained in good yields from paramethoxy derivatives (R=p-OCH3). In this case, by raising the potential of working electrode after the monofluorination step, gem difluorides can be directly prepared from 1. When the substituent
以CH 3 CN为溶剂,以Et 3 N,3HF为氟化剂,对苄基化合物进行阳极氧化,通过碳正离子+(EC B EC N机理)在吸电子基团的α位置引入氟原子。从对甲氧基衍生物(R = p-OCH 3)以高收率获得任何E基团一氟化物。在这种情况下,通过在单氟化步骤之后提高工作电极的电势,可以直接从1制备二氟化宝石。当苯环的取代基与甲氧基不同时,氟化物2和乙酰胺的混合物 通常可以得到H 2 O 3,这两种化合物的比例与阳离子稳定性有关。
Synthesis of β‐Fluorophenethyl Halopyridyl Thiourea Compounds as Non‐nucleoside Inhibitors of HIV‐1 Reverse Transcriptase
作者:T. K. Venkatachalam、F. M. Uckun
DOI:10.1081/scc-120039500
日期:2004.1.1
Abstract Synthesis of β‐fluorophenethylamines was accomplished in three steps with an overall yield of 50%. Condensation of β‐fluorophenethylamine hydrochloride with thiocarbonylimidazole derivative derived from halopyridyl amines in dimethylformamide furnished the desired thiourea compounds as crystalline solids. Several of the β‐fluorophenethyl thiourea compounds inhibited HIV‐1 reverse transcriptase
Highly selective indirect anodic fluorination of organic compounds was successfully carried out for the first time by using a task-specific ionicliquid of iodoarene as a mediator in ionicliquid hydrogen fluoride salts.