Mild and efficient oxidative aromatization of 4-substituted-1,4-dihydropyrimidines using (diacetoxyiodo)benzene
作者:Nandkishor N. Karade、Sumit V. Gampawar、Nilesh P. Tale、Sanjay B. Kedar
DOI:10.1002/jhet.389
日期:——
4‐Alkyl or aryl‐1,4‐dihydropyrimidines were readily oxidized by (diacetoxyiodo)benzene under mild reaction conditions to the corresponding pyrimidine derivatives in good to excellent yields. J. Heterocyclic Chem., (2010).
Palladium-catalyzed dehydrogenation of dihydro-heterocycles using isoprene as the hydrogen acceptor without oxidants
作者:Xiao-Jun Liu、Wen-Peng Wang、Cong-De Huo、Xi-Cun Wang、Zheng-Jun Quan
DOI:10.1039/c6cy02038k
日期:——
efficient and general method for Pd-catalyzed dehydrogenative aromatization of dihydro-heteroatom compounds without external O2 and H2 is first described. The protocol firstly uses isoprene as a hydrogenacceptor. Various dihydro-heterocycles including dihydropyrimidinones, dihydropyrimidines and dihydropyridines can be dehydrogenated to produce the corresponding aromatic heterocyclic compounds.