899717-98-7Relevant articles and documents
Synthesis of the substituted 3-cyclobutene-1,2-diones
Ivanovsky, Sergey A.,Dorogov, Mikhail V.,Kravchenko, Dmitry V.,Ivachtchenko, Alexandre V.
, p. 2527 - 2542 (2008/02/10)
A convenient synthesis of the novel squaric acid derivatives is 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 nucle