Manganese dioxide mediated oxidativecleavage of 1,3-disubstituted benzo[c]furans in dichloromethane at room temperature gave good yields of 1,2-di(het)aroylbenzenes.
Synthesis and characterization of 1,3-diarylbenzo[c]selenophenes
作者:P. Amaladass、Natarajan Senthil Kumar、Arasambattu K. Mohanakrishnan
DOI:10.1016/j.tet.2008.06.002
日期:2008.8
A series of 1,3-diarylbenzo[c]selenophenes (symmetrical/unsymmetrical) have been synthesized involving a selenium transfer reaction of keto-alcohol/benzo[c]furan using Woollins reagent. The optical and electrochemical studies of these diarylbenzo[c]selenophenes are correlated with their structures.
一系列1,3- diarylbenzo的[ C ^ ]硒吩(对称/不对称)已合成涉及酮-醇/苯并[硒转移反应Ç使用Woollins试剂]呋喃。这些二芳基苯并[ c ]硒代苯的光学和电化学研究与其结构相关。
A Single-Step Synthesis of Symmetrical 1,3-Diarylisobenzofurans
A convenient single-step synthesis of various symmetrically substituted 1,3-diarylisobenzofurans from readily available 3-methoxy-3H-isobenzofuran-1-one (1a) and two equivalents of aryl Grignard reagents is described. The title compounds are obtained in medium to high isolated yields. Crude isobenzofuran has also been trapped by maleimide, furnishing pure Diels-Alder adduct almost quantitatively.
Oxidative Ring Opening of 1,3-Diarylbenzo[c]heterocycles Using m-CPBA: Preparation of 1,2-Diaroylbenzenes
作者:Meganathan Nandakumar、Ramakrishnan Sivasakthikumaran、Arasambattu K. Mohanakrishnan
DOI:10.1002/ejoc.201200311
日期:2012.7
An unprecedented oxidative cleavage of benzo[c]heterocyclesusingm-CPBA is reported. The reaction of 1,3-diaryl benzo[c]heterocycles with m-CPBA (meta-chloroperoxybenzoic acid) at room temperature for 5 min led to the formation of 1,2-diaroylbenzenes in good to excellent yields.
Diels–Alder Reaction of 1,3-Diarylbenzo[<i>c</i>]furans with Thiophene <i>S,S</i>-Dioxide/Indenone Derivatives: A Facile Preparation of Substituted Dibenzothiophene <i>S,S</i>-Dioxides and Fluorenones
作者:Meganathan Nandakumar、Jayachandran Karunakaran、Arasambattu K. Mohanakrishnan
DOI:10.1021/ol501175q
日期:2014.6.6
One pot syntheses of substituted dibenzothiophene S,S-dioxides and fluorenones were successfully achieved by Diels–Alder reaction of benzo[c]furans with thiophene S,S-dioxides and indenones, respectively. Photophysical properties of representative seven- and nine-membered dibenzothiophene S,S-dioxide acenes were also reported.
通过苯并[ c ]呋喃的狄尔斯-阿尔德反应分别与噻吩S,S-二氧化物和茚满酮进行Diels-Alder反应,成功地完成了一锅合成取代的二苯并噻吩S,S-二氧化物和芴酮的反应。还报道了代表性的七元和九元二苯并噻吩S,S-二氧化物并苯的光物理性质。