Efficient Aerobic Oxidation of Acetals to Esters Catalyzed by<i>N</i>-Hydroxy phthalimide (NHPI) and Co(II) under Mild Conditions
作者:Babak Karimi、Jamshid Rajabi
DOI:10.1055/s-2003-42396
日期:——
Efficient oxidation of a variety of structurally diverse acetals, including open-chain acetals, 1,3-dioxanes, 1,3-dioxalanes, with molecular oxygen using catalytic amounts of N-hydroxyphthalimide (NHPI) in the presence of Co(OAc)2 as co-catalyst was investigated.
amines and carboxylicacids that complement the popular amide coupling can significantly expand accessible chemical space if they yield products distinct from the classic R–NHC(O)–R′ amide arrangement. Here we have developed an amine–acid esterification reaction based on pyridinium salt activation of amine C–N bonds to create products of type R–OC(O)–R′ upon reaction with alkyl and aryl carboxylic acids
Direct Conversion of Aromatic 1,3-Dioxanes to Hydroxypropyl Esters with Pyridinium Hydrobromide Perbromide and Sodium Acetate in Water
作者:Shinsei Sayama
DOI:10.3987/com-17-13682
日期:——
Various aromatic 1,3-dioxanes were directly converted to respective hydorxypropyl esters with pyridinum hydrobromide perbromide and sodium acetate in water at room temperature.