A Versatile One-pot Strategy for Thiazolylazo Extensions: Visible Light-Driven Photoswitches.

Area of Science:

• Organic Chemistry
• Materials Science
• Photochemistry

Background:

• Thiazolylazo derivatives are promising bidirectional visible-light switches.
• Current synthesis methods face challenges like harsh conditions, unavailable starting materials, and low yields, limiting their application.
• Developing efficient synthetic routes is crucial for advancing molecular photoswitch technology.

Purpose of the Study:

• To present a straightforward, one-pot methodology for synthesizing thiazolylazo derivatives.
• To overcome the limitations of existing synthetic approaches.
• To enable the development of new visible-light switchable molecules for various applications.

Main Methods:

• A one-pot reaction between 2-trimethylsilylthiazole and various diazonium salts.
• Synthesis of novel phenylazothiazole derivatives and asymmetric bis-heteroaryl azo compounds.
• Characterization of the synthesized compounds' photochemical and thermal properties.

Main Results:

• Successful synthesis of thiazolylazo derivatives under mild conditions with short reaction times.
• Achieved moderate to good yields for a range of derivatives.
• Demonstrated excellent E-to-Z isomerization under visible light with tunable thermal back-isomerization half-lives (seconds to days).

Conclusions:

• The developed one-pot method offers a versatile and efficient platform for synthesizing thiazolylazo derivatives.
• The synthesized compounds exhibit tunable properties, making them suitable for visible-light switchable applications.
• This work facilitates late-stage functionalization for photopharmacology and advanced materials development.