Synthesis of a Novel Bismesoionic Phenylsydnonyl-Münchnone System as an<i>in-situ</i>Intermediate Intended for the Preparation of Phenylsydnonyl-Heterocycles
作者:Chok Wah Lo、Wing Lai Chan、Yau Shan Szeto、Chiu Wing Yip
DOI:10.1246/cl.1999.513
日期:1999.6
The title bismesoionic system was generated in-situ by the treatment of N-(3-phenylsydnonyl-4-carbonyl)-N-substituted amino acid with acid anhydride. The sydnonyl münchnone reacted with DMAD and gave phenylsydnonyl-pyrrole.
dioxo crown ether with a point symmetry were synthesized by the cyclization of the corresponding substituted oligoethylene glycol monocarboxymethyl ethers using benzenesulfonylchloride in the presence of alkali metal carbonates. The reaction mechanism was discussed. Their stability constants toward sodium and potassium cations were determined and the relation between their structures and complexing