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New twin compounds having four-, five-, and seven- membered heterocyclic rings were synthesized
via Schiff bases (1a,b) which were obtained by the condensation of o-tolidine with two moles of 4-
N,N-dimethyl benzaldehyde or 4- chloro benzaldehyde. The reaction of these Schiff bases with two
moles of phenyl isothiocyanate, phenyl isocyanate or naphthyl isocyanate as in scheme(1) led to the
formation of bis -1,3- diazetidin- 2- thion and bis -1,3- diazetidin -2-one derivatives (2-4 a,b). While in
scheme (2) bis imidazolidin-4-one (5a,b) ,bistetrazole (6a,b) and bis thiazolidin-4-one (7a,b)
derivatives were produced by reacting the mentioned Schiff bases(1a,b)with two moles of glycine,
sodium azide or thioglycolic acid, respectively.
The new b
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