RESUMO
The title compound, C17H21NO2, was synthesized by the reaction of (1R)-(+)-3-benzyl-camphor and hydroxyl-amine. The oxazole ring makes a dihedral angle of 23.42â (16)° with the phenyl ring. The six-membered ring of the norboryl group adopts a boat conformation, whereas each of the five-membered rings of the norboryl group displays a flattened envelope conformation, with the C atom carrying the methyl groups representing the flap for both rings. In the crystal, mol-ecules are linked into zigzag chains propagating along the b axis by O-Hâ¯N hydrogen bonds.
RESUMO
The whole mol-ecule of the title ß-enamino-ester, C(16)H(28)N(2)O(4), is generated by a crystallographic inversion center, situated at the mid-point of the central C-C bond of the 1,4-diamino-butane segment. There are two intra-molecular N-Hâ¯O hydrogen bonds that generate S(6) ring motifs. This leads to the Z conformation about the C=C bonds [1.3756â (17)â Å]. The mol-ecule is S-shaped with the planar central 1,4-diamino-butane segment [maximum deviation for non H-atoms = 0.0058â (13)â Å] being inclined to the ethyl butyl-enonate fragment [C-C-O-C-C=C-C; maximum deviation = 0.0710â (12)â Å] by 15.56â (10)°. In the crystal, mol-ecules are linked via C-Hâ¯O inter-actions, leading to the formation of an undulating two-dimensional network lying parallel to the bc plane.
RESUMO
The title compound, C(11)H(14)Cl(4)O, was efficiently synthesized by atom-transfer radical addition between (R)-carvone and tetra-chloro-methane. In the mol-ecule, both chiral centres are of the absolute configuration R. The cyclo-hex-2-enone ring has an envelope conformation with the chiral C atom displaced by 0.633â (2)â Å from the mean plane through the other five C atoms [maximum deviation = 0.036â (2)â Å]. In the crystal, mol-ecules are linked via C-Hâ¯O inter-actions, leading to the formation of helical chains propagating along [100].
RESUMO
A recyclable catalyst, Ni(0)-CMC-Na, composed of nickel colloids dispersed in a water soluble bioorganic polymer, sodium carboxymethylcellulose (CMC-Na), was synthesized by a simple procedure from readily available reagents. The catalyst thus obtained is stable and highly active in alkene hydrogenations.
Assuntos
Carboximetilcelulose Sódica/química , Coloides , Níquel/química , Sódio/química , Catálise , Cromatografia Gasosa , Espectroscopia de Ressonância Magnética , Difração de Raios XRESUMO
The asymmetric unit of the title compound, [RuCl(C(10)H(14))(C(17)H(19)O(2))], contains two diastereomers. In both, the Ru(II) ion has a tetra-hedral coordination, formed by two O atoms of the camphor-derived ligand and the p-cymene and Cl ligands. In the crystal structure, weak inter-molecular C-Hâ¯Cl inter-actions link the mol-ecules into columns propagated along [010].
RESUMO
The racemic title compound, C(16)H(17)ClN(2), shows a tetra-hydro-isoquinoline skeleton with a 4-chloro-N-methyl-aniline group linked to the C atom at position 1. The dihedral angle between the benzene rings is 85.82â (4)°. An intra-molecular N-Hâ¯N hydrogen bond occurs. In the crystal, mol-ecules are linked through inter-molecular C-Hâ¯π inter-actions.