52868-69-6Relevant articles and documents
Novel bi-cyclic or tri-cyclic heterocyclic compound
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, (2016/10/07)
The present invention provides novel bi-cyclic or tri-cyclic compound represented by formula (I) or pharmaceutical acceptable salt thereof, [wherein, ring A is an aromatic group which may be substituted, one of X1 and X2 is a carbon atom, and another is a nitrogen atom, X3 is a nitrogen atom or CR2, X4 is a nitrogen atom or CR3, X5 is a sulfur atom or -CH=CH-, Z1 is an oxygen atom, -C(R6)(R7)-, -NH-, -C(R6)(R7)-NH-, -NH-C(R6)(R7)-, -C(R6)(R7)-O-, -O-C(R6)(R7)- or a single bone, one of Z2 and Z3 is CH and another one is a nitrogen atom, or both are nitrogen atoms, the other symbols are same as those defined in the specification.]
Synthesis of novel thiazolo[5,4-d]pyrimidines
Chattopadhyay, Gautam,Saha, Debnath,Ray, Partha Sinha,Naskar, Subhendu,Sarkar, Swarbhanu
experimental part, p. 1229 - 1234 (2010/12/24)
2-Methylsulphanyl-5-aminothiazole-4-carboxamide 1 has been used as a convenient precursor for the synthesis of new thiazolo[4,5-e][l,2,4-triazolo][4, 3-c]pyrimidines 5 and the corresponding tetrazolo analogue 7. A mesoionic isomer 8 seems to exist along w