Synthesis of carbazole derived aza[7]helicenes

被引：36

作者：

Upadhyay, Gourav M. ^{[1
]}

Talele, Harish R. ^{[1
]}

Sahoo, Sibaprasad ^{[2
]}

Bedekar, Ashutosh V. ^{[1
]}

机构：

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

[2] Sun Pharma Adv Res Ctr, Vadodara 390020, India

来源：

TETRAHEDRON LETTERS | 2014年 / 55卷 / 39期

关键词：

Aza[7]helicene; Photocyclization; Carbazole; Mizoroki-Heck coupling; One-pot Wittig-Heck reaction; ONE HUNDRED YEARS; PYRIDINE N-OXIDES; STEREOSELECTIVE SYNTHESES; CHIRAL RECOGNITION; BIS-OXAZINES; HELICENE; RESOLUTION; AGGREGATION; DERIVATIVES; BINDING;

D O I：

10.1016/j.tetlet.2014.07.116

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Synthesis of four derivatives of symmetrical aza[7]helicenes is achieved by I-2-THF mediated photocyclization of corresponding bis-styryl derivatives. The cyclization furnished the desired angularly fused azahelicene in moderate yields. The structures are established by NMR spectroscopy and single crystal X-ray analysis for the difluoro derivative. The series of synthesized aza[7]helicenes showed remarkable thermal stability as indicated by DSC analysis. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：5394 / 5399

页数：6

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