Masking and Demasking Strategies for the BF2–BODIPYs as a Tool for BODIPY Fluorophores
摘要:
An efficient and chemoselective route for transforming BF(2)BODIPYs to Et2B-BODIPYs (masking) was developed using Et2AlCl. The Et groups can be easily replaced with F atoms using BF3 center dot Et2O in moist CH2Cl2 to regenerate the BF(2)BODIPYs (demasking). The maskingdemasking strategy is very useful for synthesizing functionalized BODIPYs via nucleophilic and reductive reactions. The masking strategy was used to synthesize a BODIPY dimer by McMurry coupling of a formyl Et2BBODIPY, while a new BODIPY with an asymmetrically substituted B-center was synthesized using the demasking strategy.
Activation and deprotection of F-BODIPYs using boron trihalides
作者:Travis Lundrigan、T. Stanley Cameron、Alison Thompson
DOI:10.1039/c4cc02706j
日期:——
The activation of F-BODIPYs with borontrihalides, followed by treatment with a nucleophile, effects facile substitution at boron; using water as the nucleophile promotes deprotective removal of the -BF2 moiety and thereby production of the corresponding parent dipyrrin salt in quantitative yield under extremely mild conditions.
Conversion of <i>F</i>-BODIPYs to <i>Cl</i>-BODIPYs: Enhancing the Reactivity of <i>F</i>-BODIPYs
作者:Travis Lundrigan、Alison Thompson
DOI:10.1021/jo302277d
日期:2013.1.18
A new method for the synthesis of Cl-BODIPYs from F-BODIPYs is reported, merely requiring treatment of the F-BODIPY with boron trichloride. Cl-BODIPYs are exploited as synthetic intermediates generated in situ for the overall conversion of F-BODIPYs to O- and C-BODIPYs in high overall yields using a mild one-pot procedure. This route enables F-BODIPYs to be transformed into derivatives that are not accessible via the direct route, as demonstrated via the use of 1,3-propanediol.
Masking and Demasking Strategies for the BF<sub>2</sub>–BODIPYs as a Tool for BODIPY Fluorophores
作者:Ankush B. More、Soumyaditya Mula、Shrikant Thakare、Nagaiyan Sekar、Alok K. Ray、Subrata Chattopadhyay
DOI:10.1021/jo502028g
日期:2014.11.21
An efficient and chemoselective route for transforming BF(2)BODIPYs to Et2B-BODIPYs (masking) was developed using Et2AlCl. The Et groups can be easily replaced with F atoms using BF3 center dot Et2O in moist CH2Cl2 to regenerate the BF(2)BODIPYs (demasking). The maskingdemasking strategy is very useful for synthesizing functionalized BODIPYs via nucleophilic and reductive reactions. The masking strategy was used to synthesize a BODIPY dimer by McMurry coupling of a formyl Et2BBODIPY, while a new BODIPY with an asymmetrically substituted B-center was synthesized using the demasking strategy.
Cl-BODIPYs: a BODIPY class enabling facile B-substitution
作者:Travis Lundrigan、Sarah M. Crawford、T. Stanley Cameron、Alison Thompson
DOI:10.1039/c1cc16351e
日期:——
Cl-BODIPYs, synthesized in high yields from dipyrrins under air- and moisture-free conditions, are extremely facile to substitution at boron compared to their corresponding F-BODIPYs, opening up a new route to BODIPYs functionalized at boron.