Free Radicals by Mass Spectrometry. VIII. The Ionization Potentials ofPara‐, Ortho‐,andMeta‐Xylyl Radicals
摘要:
The vertical ionization potentials of the para-, ortho- and meta-xylyl radicals as measured by electron impact are found to be 7.46±0.03, 7.61±0.05, and 7.65±0.03 v, respectively. The thermal dissociation of the para- and ortho-xylyl radicals to form the quinodimethanes has been observed. The meta-xylyl radical was found to have a considerably greater thermal stability.
Conversion of Aryl Aldehydes to Benzyl Iodides and Diarylmethanes by H<sub>3</sub>PO<sub>3</sub>/I<sub>2</sub>
作者:Fang Lv、Jing Xiao、Junchun Xiang、Fengzhe Guo、Zi-Long Tang、Li-Biao Han
DOI:10.1021/acs.joc.0c02850
日期:2021.2.5
reductive benzylation reactions with aryl aldehydes. By using a H3PO3/I2 combination, various aromaticaldehydes underwent iodination reactions and Friedel–Crafts typereactions with arenes via benzyl iodide intermediates, readily producing benzyl iodides and diarylmethanes in good yields. Intramolecular cyclization reactions also took place, giving the corresponding cyclic compounds. This new strategy features
在与芳基醛的苄基还原反应中,H 3 PO 3首次被用作还原剂和促进剂。通过使用H 3 PO 3 / I 2组合,各种芳族醛经过苄基碘中间体与芳烃进行碘化反应和Friedel-Crafts型反应,可轻松以高收率生产苄基碘和二芳基甲烷。分子内环化反应也发生,得到相应的环状化合物。这种新策略具有易于处理,低成本和无金属的条件。
A mild and highly chemoselective iodination of alcohol using polymer supported DMAP
作者:DIPARJUN DAS、JASHA MOMO H ANAL、LALTHAZUALA ROKHUM
DOI:10.1007/s12039-016-1158-1
日期:2016.11
supported DMAP is used in catalytic amount and is recovered and reused several times. Additionally, this method is highly chemoselective. A mild and highly selective iodination of alcohols using polymer supported 4-(Dimethylamino)pyridine (DMAP) in catalytic amount is reported. The basecatalyst can be easily recovered by simple filtration and reused several times without appreciable loss in activity.
Efficient Method for Iodination of Alcohols using KI/Silica Sulfuric Acid (SSA)
作者:Abdol R. Hajipour、Amin Zarei、Aronold E. Ruoho
DOI:10.1080/00397910500503421
日期:2006.5
Abstract A straightforward and effective procedure for the conversion of benzylic and allylicalcohols to the corresponding iodides using KI/SSA in acetonitrile at room temperature.
摘要 在室温下,在乙腈中使用 KI/SSA 将苄醇和烯丙醇转化为相应碘化物的简单有效程序。
Iodination of alcohols using triphenylphosphine/iodine under solvent-free conditions using microwave irradiation
作者:Abdol Reza Hajipour、Ali Reza Falahati、Arnold E. Ruoho
DOI:10.1016/j.tetlet.2006.04.036
日期:2006.6
A straightforward and effective procedure for the conversion of benzylic, allylic and aliphatic alcohols to the corresponding iodides using Ph3P/I2 under solvent-free conditions using microwaveirradiation is reported.
据报道,在无溶剂条件下,使用微波辐照,使用Ph 3 P / I 2将苄基,烯丙基和脂族醇转化为相应的碘化物,是一种简单有效的方法。
Regioselective transformation of allylic, benzylic and tertiary alcohols into the corresponding iodides wrih aluminium triiodide: deoxygenation of vicinal diols
作者:Parijat Sarmah、Nabin C Barua
DOI:10.1016/s0040-4020(01)81035-8
日期:1989.1
Aluminium triiodide regioselectively converts allylic, benzylic and tertiary alcohols Into the corresponding iodides in excellent yields. It also deoxygenates cis and trans secondary-tertiary and allylic bis—secondary vicinal diols in good yields.