Synthesis of the Substituted 3‐Cyclobutene‐1,2‐diones
作者:Sergey A. Ivanovsky、Mikhail V. Dorogov、Dmitry V. Kravchenko、Alexandre V. Ivachtchenko
DOI:10.1080/00397910701462716
日期:2007.8
reported. Unsymmetrically substituted 3,4‐diamino‐3‐cyclobutene‐1,2‐diones and 3‐amino‐4‐hydroxy‐3‐cyclobutene‐1,2‐diones were prepared by interaction of diethyl squarate with different nucleophilic reagents such as alkali, primary and secondary amines and amino acids. Substituted 3‐amino‐4‐aryl‐3‐cyclobutene‐1,2‐diones were synthesized by interaction of squaryl dichloride with different arenes followed