A Mild, Room-Temperature Protection of Ketones and Aldehydes as 1,3-­Dioxolanes under Basic Conditions

A Mild, Room-Temperature Protection of Ketones and Aldehydes as 1,3-­Dioxolanes under Basic Conditions

Hassner, Alfred; et al

Department of Chemistry,Bar-IlanUniversity,Ramat-Gan52900,Israel

Protection of ketones or aldehydes as 1,3-dioxolane derivatives proceeds within minutes at room temperature in the presence of N-hydroxybenzenesulfonamide, its O-benzyl derivative, or the tosyl analogue, in the absence of strong protonic acids, and in the presence of base (Et₃N). Acid-sensitive groups such as O-THP, O-TBS, or N-Boc are unaffected.

https://www.thieme-connect.com/ejournals/abstract/10.1055/s-0032-1317529 

THANKS AND REGARD’S
DR ANTHONY MELVIN CRASTO Ph.D