A strained alkyne-containing bipyridine reagent; synthesis, reactivity and fluorescence properties.
RSC Adv 2019;
9:36154-36161. [PMID:
35540623 PMCID:
PMC9074932 DOI:
10.1039/c9ra06866j]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/29/2019] [Indexed: 01/18/2023] Open
Abstract
We report the synthesis of a bipyridyl reagent containing a strained alkyne, which significantly restricts its flexibility. Upon strain-promoted alkyne-azide cycloaddition (SPAAC) with an azide, which does not require a Cu catalyst, the structure becomes significantly more flexible and an increase in fluorescence is observed. Upon addition of Zn(ii), the fluorescence is enhanced further. The reagent has the potential to act as a fluorescent labelling agent with azide-containing substrates, including biological molecules.
A bipyridyl reagent containing a strained alkyne 7, reacts with benzyl azide to give a significantly more flexible product 10 and an increase in fluorescence is observed. Upon addition of Zn(ii), the fluorescence is enhanced further.![]()
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