New L-serine derivative ligands were prepared and tested as cocatalyst in the Diels-Alder reactions between cyclopentadiene (CPD) and methyl acrylate, in the presence of several Lewis acids. The catalytic potential of the in situ formed complexes was evaluated based on the reaction yield. Bidentate serine ligands showed good ability to coordinate medium strength Lewis acids, thus boosting their...

Poly(methyl acrylate) (PMA) + SiO2 composites were synthesized via a sol-gel reaction. The base acrylic copolymers with a content of alkoxysilane groups were prepared by co-polymerization of methylacrylate (MA) with 3-(trimethoxysilyl) propylmethacrylate (3MPS) or vinyltrimethoxysilane (VTMS); the products were cocondensed with tetraethylorthosilicate (TEOS). The PMA + SiO2 hybrids were charact...

The title compound, C(16)H(24)O(3), was synthesized from ilicic acid, which was isolated from the aerial part of Inula viscosa- (L) Aiton [or Dittrichia viscosa- (L) Greuter]. The asymmetric unit contains two independent mol-ecules, in each of which the seven-membered ring shows a chair conformation, whereas the five-membered ring presents disorder. In the two molecules, three C atoms in the fi...

The title compound, C(24)H(26)N(2)O(8), was synthesized by the cyclo-addition reaction of methyl 2-phenyl-acrylate, diethyl 2-amino-malonate and 4-nitro-benzaldehyde. The pyrrolidine ring exhibits an envelope conformation. The two benzene rings are located on opposite sides of the pyrrolidine ring and subtend a dihedral angle of 59.16 (14)°. The crystal packing is stabilized by N-H⋯O and weak C...

We describe highly enantioselective synthesis of -amino acid derivatives (1a-c) using asymmetric hydrogenation of -aminomethylacrylates (2a-c), which contain a free basic NOH group, as the key step. The -aminomethylacrylates (2a-c) were prepared using the Baylis– Hillman reaction of an appropriate aldehyde with methyl acrylate followed by acetylation of the resulting allylic alcohols (4a-b) and...

The title compound, C(8)H(10)N(2)O(2)S, was prepared by the reaction of 2-cyano-3,3-bis-(methyl-sulfan-yl)acrylate and 2-amino-ethanethiol at 350 K. The mol-ecular structure and packing are stabilized by N-H⋯O hydrogen-bond inter-actions. All the non-H atoms are nearly in the same plane with the maximum deviation being 0.08 Å.

In the title compound, C(11)H(10)BrClO(2), the dihedral angle between the benzene ring and the plane of the acrylate unit is 62.1 (1)°. The crystal packing is stabilzed by inter-molecular C-H⋯O hydrogen bonds and C-Cl⋯π inter-actions [Cl⋯centroid = 3.829 (1) Å and C-Cl⋯centroid = 165.3 (1)°].