Maria Carla Marcotullio

Ytterbium triflate promoted synthesis of 1,5-benzodiazepine derivatives

Abstract 2,3-Dihydro-1 H -1,5 benzodiazepines have been synthetized in very good yield in solvent-free conditions from o -phenylendiamine and ketones in the presence of Yb(OTf) 3 as catalyst. The method is applicable to both cyclic or acyclic ketones without significant differences.

Heterogeneous Catalysis in Trimethylsilylation of Alcohols and Phenols by Zirconium Sulfophenyl Phosphonate

Abstract Layered zirconium sulfophenyl phosphonate was found to be an efficient heterogeneous catalyst for the trimethylsilylation of alcohols and phenols.

Preparation and deprotection of 1,1-diacetates (acylals) using zirconium sulfophenyl phosphonate as catalyst

Layered zirconium sulfophenyl phosphonate was found to be an efficient heterogeneous catalyst for the preparation and deprotection of 1,1-diacetates.

Zirconium Sulfophenyl Phosphonate as a Heterogeneous Catalyst in the Preparation of β-Amino Alcohols from Epoxides

A convenient method for the ring opening of epoxides by aromatic amines, catalysed by zirconium sulfophenyl phosphonate in solvent-free conditions, is described.

Synthesis of Collinin, an Antiviral Coumarin

Collinin (1), a geranyloxycoumarin, has been synthesized in three steps and 24.6% overall yield from pyrogallol (2) and propiolic acid (3).

The effect of triacontanol on micropropagation and on secretory system of Thymus mastichina

Shoot multiplication of Thymus mastichina L. was achieved on media containing 0.1 mg l−1 6-benzyladenine and/or 0.1 mg l−1 indole-3-butyric acid, or in hormone-free medium (control). The growth of plantlets, the production and composition of the essential oil, the density and secretory stage of glandular hairs have been evaluated in the presence and absence of growth regulators and triacontanol. We observed a positive effect of triacontanol on the growth of micropropagated plantlets using different conditions. Media with different levels of BA, IBA and TRIA resulted in no differences in the composition of the essential oil produced by plantlets. The major components of the oil were 1,8-cineole and linalool. An increase in the oil yield was observed especially when triacontanol was added to hormone-free medium. There was no correlation between changes in the oil yield and glandular hairs density, but the yield was dependent on the secretory stage of the glands.

Zirconium sulfophenyl phosphonate as a heterogeneous catalyst in tetrahydropyranylation of alcohols and phenols

Abstract Zirconium Sulfophenyl Phosphonate Zr(O 3 PCH 3 ) 1.2 (O 3 PC 6 H 4 SO 3 H) 0.8 was found to be an efficient heterogeneous catalyst for the tetrahydropyranylation of alcohols and phenols.

Novel chiral Schiff base ligands from amino acid amides and salicylaldehyde

A novel type of symmetric chiral Schiff base ligands has been synthesized in good yield using an easy and good yielding stepwise approach from o-phenylenediamine, amino acids and salicylaldehyde.

Sesquiterpene acids from Dittrichia viscosa

Abstract Dittrichia viscosa afforded in addition to compounds reported previously, ilicic acid and two new sesquiterpene acids. The structures of the new compounds were established by chemical and spectral methods.

Heterogeneous catalysis in acetylation of alcohols and phenols promoted by zirconium sulfophenyl phosphonate.

Abstract Layered zirconium sulfophenyl phosphonate was found to be an efficient heterogeneous catalyst for the acetylation of alcohols and phenols.