1. SYNTHESIS AND STRUCTURAL ANALYSIS OF SOME NEW PRECURSORS OF MACROCYCLIC CYCLOPHANES: 1,4-BIS (2-R-5,5-DIMETHYL-1,3-DIOXAN-2-YL) BENZENE. Authors: ION GROSU, LUMINIŢA DAVID, ANAMARIA TEREC, ELENA BOGDAN, ANDREI ŞERBAN GÂZ, FLAVIA POP, NICULINA BOGDAN.2. SYNTHESIS AND STRUCTURAL ANALYSIS OF SOME NEW PRECURSORS OF MACROCYCLIC CYCLOPHANES: 1,4-BIS (2-R-5-R1-1,3-DIOXAN-2-YL) BENZENE DERIVATIVES. Authors: NICULINA BOGDAN, ANDREI ŞERBAN GÂZ, FLAVIA POP, ELENA BOGDAN, ANAMARIA TEREC, LUMINIŢA DAVID, ION GROSU.