Study on the reactive transient a-?3-iodanyl-acetophenone complex in the iodine(III)/PhI(I) catalytic cycle of iodobenzene-catalyzed a-acetoxylation reaction of acetophenone by electrospray ionization tandem mass spectrometry | |
Wang HY(王昊阳) ; Zhou J(周娟) ; Guo YL(郭寅龙) | |
刊名 | Rapid Commun. Mass Spectrom. |
2012 | |
卷号 | 26期号:6页码:616-620 |
ISSN号 | 0951-4198 |
其他题名 | 电喷雾串联质谱研究碘苯催化的苯乙酮α-酰基化反应中活性三价碘复合物以及三价碘复合物/碘苯间的催化循环 |
通讯作者 | 王昊阳 ; 郭寅龙 |
英文摘要 | RATIONALE: Hypervalent iodine compounds are important and widely used oxidants in organic chemistry. In 2005, Ochiai reported the PhI-catalyzed alpha-acetoxylation reaction of acetophenone by the oxidation of PhI with m-chloroperbenzoic acid (m-CPBA) in acetic acid. However, until now, the most critical reactive alpha-lambda(3)-iodine alkyl acetophenone intermediate (3) had not been isolated or directly detected. METHODS: Electrospray ionization tandem mass spectrometry (ESI-MS/ MS) was used to intercept and characterize the transient reactive alpha-lambda(3)-iodine alkyl acetophenone intermediate in the reaction solution. RESULTS: The trivalent iodine species was detected when PhI and m-CPBA in acetic acid were mixed, which indicated the facile oxidation of a catalytic amount of PhI(I) to the iodine(III) species by m-CPBA. Most importantly, 3.H+ was observed at m/z 383 from the reaction solution and this ion gave the protonated alpha-acetoxylation product 4.H+ at m/z 179 in MS/MS by an intramolecular reductive elimination of PhI. CONCLUSIONS: These ESI-MS/ MS studies showed the existence of the reactive alpha-lambda(3)-iodine alkyl acetophenone intermediate 3 in the catalytic cycle. Moreover, the gas-phase reactivity of 3.H+ was consistent with the proposed solution-phase reactivity of the alpha-lambda(3)-iodine alkyl acetophenone intermediate 3, thus confirming the reaction mechanism proposed by Ochiai. Copyright (C) 2012 John Wiley & Sons, Ltd. |
学科主题 | 分析化学 |
收录类别 | SCI |
原文出处 | http://dx.doi.org/10.1002/rcm.6145 |
语种 | 英语 |
WOS记录号 | WOS:000300505400005 |
公开日期 | 2013-08-29 |
内容类型 | 期刊论文 |
源URL | [http://202.127.28.38/handle/331003/28667] |
专题 | 上海有机化学研究所_分析化学研究室 |
推荐引用方式 GB/T 7714 | Wang HY,Zhou J,Guo YL. Study on the reactive transient a-?3-iodanyl-acetophenone complex in the iodine(III)/PhI(I) catalytic cycle of iodobenzene-catalyzed a-acetoxylation reaction of acetophenone by electrospray ionization tandem mass spectrometry[J]. Rapid Commun. Mass Spectrom.,2012,26(6):616-620. |
APA | 王昊阳,周娟,&郭寅龙.(2012).Study on the reactive transient a-?3-iodanyl-acetophenone complex in the iodine(III)/PhI(I) catalytic cycle of iodobenzene-catalyzed a-acetoxylation reaction of acetophenone by electrospray ionization tandem mass spectrometry.Rapid Commun. Mass Spectrom.,26(6),616-620. |
MLA | 王昊阳,et al."Study on the reactive transient a-?3-iodanyl-acetophenone complex in the iodine(III)/PhI(I) catalytic cycle of iodobenzene-catalyzed a-acetoxylation reaction of acetophenone by electrospray ionization tandem mass spectrometry".Rapid Commun. Mass Spectrom. 26.6(2012):616-620. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论