Photo-induced glycosylation using edible polyphenol sinapinic acid

Area of Science:

• Organic Chemistry
• Photochemistry
• Glycosylation Reactions

Background:

• Glycosylation is crucial for synthesizing biologically active molecules.
• Traditional glycosylation methods often require harsh conditions or complex activators.
• Developing mild and efficient glycosylation strategies remains a key challenge in carbohydrate chemistry.

Purpose of the Study:

• To investigate photo-induced glycosylation reactions using trichloroacetimidate donors.
• To explore the use of sinapinic acid as a photosensitizer for glycosylation.
• To establish a mild and chemoselective method for glycoside synthesis.

Main Methods:

• Irradiation of trichloroacetimidate donors and alcohol acceptors with long-wavelength UV light (365 nm).
• Utilizing sinapinic acid as a photosensitizer.
• Evaluating the reaction scope with various donors and acceptors.

Main Results:

• Smooth glycosylation reactions were achieved under mild conditions.
• High yields of corresponding glycosides were obtained.
• The method demonstrated excellent chemoselectivity over other glycosyl donors.

Conclusions:

• Photo-induced glycosylation using sinapinic acid is a highly effective method.
• This approach offers a mild, efficient, and chemoselective alternative for glycoside synthesis.
• The developed method is applicable to a wide range of substrates.