Synthesis and photophysical properties of bi-aza[5]helicene and bi-aza[6]helicene

被引：17

作者：

Upadhyay, Gourav M. ^{[1
]}

Bedekar, Ashutosh V. ^{[1
]}

机构：

[1] Maharaja Sayajirao Univ Baroda, Dept Chem, Fac Sci, Vadodara 390002, India

来源：

TETRAHEDRON | 2015年 / 71卷 / 34期

关键词：

Bi-aza[n]helicene; Photocyclization; Fluorescence spectroscopy; ONE HUNDRED YEARS; PYRIDINE N-OXIDES; ENANTIOSELECTIVE SYNTHESIS; STEREOSELECTIVE SYNTHESES; CHIRAL RECOGNITION; ELECTRON-RICH; BIS-OXAZINES; HELICENE; RESOLUTION; AGGREGATION;

D O I：

10.1016/j.tet.2015.06.040

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Synthesis of two derivatives of bi-aza[n]helicenes is achieved by I-2-THF mediated photocyclization of corresponding bi-styryl derivatives. The cyclization furnished the desired angularly fused bi-aza[5] helicene and bi-aza[6]helicene in moderate yields. The structures are established by NMR spectroscopy and single crystal X-ray analysis. The crystal structure indicate an unusually planer central biphenyl unit in the bi-aza[6]helicene. It also indicates to the presence of 'P' and 'M' stereoisomer in the bi-aza[6] helicene making it a meso isomer. The series of synthesized bi-aza[n]helicenes were characterized by UV and fluorescence spectroscopy. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：5644 / 5649

页数：6

共 43 条

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