Efficient low-cost preparation of
trans-cyclooctenes using a simplified flow setup for photoisomerization.
MONATSHEFTE FUR CHEMIE 2016;
147:579-585. [PMID:
27069284 PMCID:
PMC4785212 DOI:
10.1007/s00706-016-1668-z]
[Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 12/24/2015] [Indexed: 12/20/2022]
Abstract
Abstract
Bioorthogonal ligations have emerged as highly versatile chemical tools for biomedical research. The exceptionally fast reaction between 1,2,4,5-tetrazines and trans-cyclooctenes (TCOs), also known as tetrazine ligation, is frequently used in this regard. Growing numbers of applications for the tetrazine ligation led to an increased demand for TCO compounds, whose commercial availability is still very limited. Reported photochemical procedures for the preparation of TCOs using flow chemistry are straightforward and high yielding but require expensive equipment. Within this contribution, we present the construction and characterization of a low-cost flow photoreactor assembled from readily accessible components. Syntheses of all commonly used trans-cyclooctene derivatives were successfully carried out using the described system. We are convinced that the presented system for photoisomerization will promote access to bioorthogonally reactive TCO derivatives.
Graphical abstract
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Electronic supplementary material
The online version of this article (doi:10.1007/s00706-016-1668-z) contains supplementary material, which is available to authorized users.
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