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Abstract
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化学

Bakır (I) 'in bir Corannulene-işlevselleştirilmiş Hexahelicene hazırlanması düzlemsel olmayan Poliaromatik Birimleri alkin azid siklo, paladyum

Published: September 18, 2016
doi:
10.3791/53954
, ,
1GIR MIOMeT, IU CINQUIMA, Área de Química Inorgánica,Universidad de Valladolid

概要

Burada, uygun verimlerle kolay monte üç düzlemsel olmayan poliaromatik ünitelerinden oluşan karmaşık bir organik bileşik, sentezi için bir protokol mevcut.

Abstract

The main purpose of this video is to show 6 reaction steps of a convergent synthesis and prepare a complex molecule containing up to three nonplanar polyaromatic units, which are two corannulene moieties and a racemic hexahelicene linking them. The compound described in this work is a good host for fullerenes. Several common organic reactions, such as free-radical reactions, C-C coupling or click chemistry, are employed demonstrating the versatility of functionalization that this compound can accept. All of these reactions work for planar aromatic molecules. With subtle modifications, it is possible to achieve similar results for nonplanar polyaromatic compounds.

Introduction

Kendi özel geometri, corannulene ve helicenes uzak düzlemsellikten bir yapının ve ilginç özelliklere yol açmaktadır. Son yıllarda 1-15 olabilir moleküllerdir nedeniyle, karbon nanotüpler ve fullerenler moleküler reseptörlerin arama çok aktif bir alandır 16-19 nedeniyle, ağırlıklı olarak, organik güneş pilleri, transistörler, sensörler ve diğer cihazlar için malzeme olarak potansiyel uygulamaları. 20-28 corannulene ve fullerenin arasında şekil mükemmel tamamlayıcılık tasarımı amacı ile çeşitli araştırmacıların dikkatini çekmiştir London kuvvetleri tarafından supramoleküler dernek kurma yeteneğine sahip moleküler reseptörler. 29-39

Yukarıda belirtilen düzlemsel olmayan poliaromatik bileşikler kimyası tamamen düzlemsel moleküller için tarif edilene benzer, ancak arzu edilen seçicilikler ve verimleri elde etmek için uygun koşullar bulmak bazen zor olabilir. 40 </sup> Bu çalışmada her araştırma laboratuarında bulunan kolay ve tipik tekniklerin uygulanması ile iyi verimler ile birkaç adımda üç poliaromatik birimlerine sahip bir molekül (7) 'in sentezini sunar. Bu çözelti içinde, C 60 37 ile iyi bir etkileşim kurmak için bir kıskaç benzeri yapıyı alabilir molekülü büyük bir öneme sahiptir; ve bunun nedeni, bir stereojenik ekseninin varlığı için bir kiral molekül helicene bağlayıcı, daha yüksek şiral fulleren sayesinde potansiyel bir reseptör olarak bir araştırma çizgisini açabilir. 41-45 Ancak, yalnızca rasemik helicene bu çalışmada kullanılır.

Ticari olarak mevcut olmadıklarında, çünkü, bu noktada, bu reseptörleri sentez tek sınırlama, helicenes ve corannulenes hazırlanmasıdır. Ancak, yeni yöntemlere uygun olarak, zaman, makul bir kısa bir süre içinde uygun miktarlarda elde edilebilir 46-48 başka bir yerde yayımlandığı.

Protocol

1. işlevselleştirilmesi 2,15-Dimethylhexahelicene 2,15-dimethylhexahelicene ve Dibromination % 30 benzoil peroksit (BPO) (% 70 0.356 g (1.0 mmol) 2,15-dimethylhexahelicene bölgesinin 0.374 g (2.1 mmol) yeni yeniden kristalize N-bromosuksinımid bölgesinin (NBS) ve 24 mg (0.07 mmol) ağırlıkça tartılır dengeleyici olarak su). Manyetik bir karıştırma çubuğuna sahip 100 ml'lik bir Schlenk şişesi içinde, tüm katı maddeler yerleştirin. S…

Representative Results

Corannulene (3 a) ve 2,15-dimethylhexahelicene (3 b) çok iyi verimlerle (Şekil 5) ile birlikte basit bir şekilde mevcut yöntemlerin 46-48 Aşağıdaki hazırlanabilir. Hem nihai molekülün yakınsak sentez için farklı yol açan, başlangıç ​​malzemesi olarak, ortak bir molekülü, 2,7-dimetilnaftalen paylaşır. <im…

Discussion

Nihai bileşik 7 düzlemsel olmayan poliaromatik ön-6 Adım 3 a ve her reaksiyonda orta çok iyi verimlerle 3 b sonra hazırlanmıştır. Bu rota görülen başlıca sınırlama hem düzlemsel olmayan poliaromatik bileşiklerin bromination oldu. Bununla birlikte, bileşik 4 bir durumda, serbest corannulene önemli miktarda daha kullanımlar için geri kazanılabilir. 4 B</stron…

開示

The authors have nothing to disclose.

Acknowledgements

This work was funded by the Spanish Ministerio de Economìa y Competitividad (CTQ 2013-41067-P). H.B. acknowledge with thanks a MEC-FPI grant.

Materials

2,15-Dimethylhexahelicene N/A N/A Prepared according to reference 5b,c in the main text.
Corannulene N/A N/A Prepared according to reference 5a in the main text.
N-Bromosuccinimide (NBS) Sigma Aldrich B8.125-5 ReagentPlus®, 99%. Recrystallized from hot water.
Benzoyl peroxide (BPO) Sigma Aldrich B-2030 ~70% (titration). 30% water as stabilizer.
Sodium azide Sigma Aldrich S2002 ReagentPlus®, ≥99.5%.
Gold (III) chloride Hydrate Sigma Aldrich 50778 puriss. p.a., ACS reagent, ≥49% Au basis.
Ethynyltrimethylsilane Sigma Aldrich 218170 98%.
[PdCl2(dppf)] N/A N/A Prepared according to reference 6 in the main text.
CuI N/A N/A Prepared according to reference 7 in the main text.
KF Sigma Aldrich 307599 99%, spray-dried.
(+)-Sodium L-ascorbate Fluka 11140 BioXtra, ≥99.0% (NT).
Copper(II) Sulphate 5-hydrate Panreac 131270 for analysis.
Carbon tetrachloride (CCl4) Fluka 87030 for IR spectroscopy, ≥99.9%.
Dichloromethane (DCM) Fisher Scientific D/1852/25 Analytical reagent grade. Distilled prior to use.
Hexane Fisher Scientific H/0355/25 Analytical reagent grade. Distilled prior to use.
Ethyl acetate Scharlau AC0145025S Reagent grade. Distilled prior to use.
Tetrahydrofuran (THF) Fisher Scientific T/0701/25 Analytical reagent grade. Distilled prior to use.
1,2-Dichloroethane (DCE) Sigma Aldrich D6,156-3 ReagentPlus®, 99%.
Methanol (MeOH) VWR 20847.36 AnalaR NORMAPUR.
Triethyl amine (NEt3) Sigma Aldrich T0886 ≥99%.
Silica gel Acros 360050010 Particle size 40-60mm.
Sand – low iron Fisher Scientific S/0360/63 General purpose grade.
TLC Silica gel 60 F254 Merck 1.05554.0001
Monowave 300 (Microwave reactor) Anton Para
Sonicator Grupo Selecta 3000513 6 Litres.
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タグ

CorannuleneHexaheliceneCopper(I)-catalyzed Alkyne-azide CycloadditionNonplanar Polyaromatic UnitsClick ChemistryRadical ReactionsCarbon-carbon CouplingDebrominationColumn Chromatography

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Álvarez, C. M., Barbero, H., Ferrero, S. Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units. J. Vis. Exp. (115), e53954, doi:10.3791/53954 (2016).
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