Microwave-Assisted Synthesis of Substituted 2-(Benzylthio)imidazo[1,2a]pyrimidin-5-ones
摘要:
A microwave-assisted solid-phase synthesis of 2-(benzylthio)imidazo[1,2a]pyrimidin-5-ones has been developed. Using microwave irradiation, the reaction time was significantly reduced from a few days to 80 min. A representative set of 10 2-(benzylthio)-6.7-substituted-imidazo[1,2a]pyrimidin-5-ones was prepared. These compounds Were subsequently N-alkylated and formylated in good yields.
Brønsted Acid Catalyzed Cyclization of Aminodiazoesters with Aldehydes to 3-Carboxylate-<i>N</i>-Heterocycles
作者:Yang Jiao、Anrong Chen、Bangkui Yu、Hanmin Huang
DOI:10.1021/acs.orglett.0c02125
日期:2020.8.7
A Brønsted acidcatalyzedcyclization of aminodiazoesters with aldehydes is described. This reaction features broad substrate generality and functional group compatibility, affording a wide range of 5–7-membered 3-carboxylate-N-heterocycles containing different functional groups. The title products are able to be further elaborated through simple functional group transformations to produce synthetically