2-Amino-5-nitro-6-ribitylamino-4(3H)-pyrimidinone (7) was phosphorylated with chlorophosphoric acid yielding an isomer mixture containing about 63% of the 5'-phosphate 7a together with other monophosphates and bisphosphates of 7. Preparative HPLC afforded pure 7a. Catalytic hydrogenation of 7a yields the labile substrate of pyrimidine deaminase, 2,5-diamino-6-ribitylamino-4(3H)-pyrimidinone 5'-...

In this paper six new copoly(amide-imide)s (7a-f) were synthesized through the direct polycondensation reaction of N,N'-(4,4'-diphenylsulfone)bistrimellitimide (1) with 4,4'-diamino diphenylsulfone (2), 4,4'-diamino diphenylether (3), in the presence of adipic acid (4), fumaric acid (5) or terephthalic acid (6) as the second diacid in a medium consisting of N-methyl-2-pyrrolidone, triphenyl pho...

New macrocyclic binuclear nickel(ii) complexes have been synthesized by using the bicompartmental mononuclear complex [NiL] [3,30-((1E,7E)-3,6-dioxa-2,7-diazaocta-1,7-diene-1,8-diyl)bis(3-formyl-5-methyl-2-diolato)nickel(II)] with various diamines like 1,2-bis(aminooxy)ethane (L(1)), 1,2-diamino ethane (L(2)), 1,3-diamino propane (L(3)), 1,4-diamino butane (L(4)), 1,2-diamino benzene (L(5)), an...

We explore tautomerism and its consequences in the first example of diamino-benzoquinonediimine bearing both electron-donating electron-withdrawing groups on same 6-? electron subunit.