Photochromism of dihydroindolizines. Part XVIII: palladium-catalyzed Negishi coupling for the synthesis of photochromic dihydro 5-azaindolizine-linker-conjugates with a terminal ethylene anchoring group

被引：16

作者：

Ahmed, Saleh A. ^{[1
,2
,3
]}

Khairou, Khalid S. ^{[1
]}

Abdel-Wahab, Aboel-Magd A. ^{[2
]}

Hozien, Zeinab A. ^{[2
]}

Duerr, Heinz ^{[3
]}

机构：

[1] Umm Al Qura Univ, Dept Chem, Fac Sci Appl, Mecca, Saudi Arabia

[2] Assiut Univ, Dept Chem, Fac Sci, Assiut 71516, Egypt

[3] Univ Saarland, D-66041 Saarbrucken, Germany

来源：

TETRAHEDRON LETTERS | 2012年 / 53卷 / 33期

关键词：

Photochromism; Dihydro 5-azaindolizine (DHAI); Linker-conjugate; Reformatsky reagent; Q-phos; Half-lives; PHOTOPHYSICAL BEHAVIOR; LIGHT;

D O I：

10.1016/j.tetlet.2012.06.039

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Eight new photochromic dihydro 5-azaindolizine-linker-conjugates with a terminal ethylene anchoring group have been synthesized via palladium-catalyzed Negishi coupling. Polychromatic light irradiation of the photochromic dihydro 5-azaindolizines (DHAIs) led to ring-opened colored betaines which underwent reversible thermal 1,5-electrocyclization into their corresponding DHAIs in the second domain. The noteworthy multiaddressable photochromic properties are useful for a plethora of new applications for these materials such as anchoring the ethylene group to metal-oxide nanoparticles. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：4397 / 4401

页数：5

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