3,3′-Ethylenebis(3,4-dihydro-6-chloro-2H-1,3-benzoxazine)
نویسندگان
چکیده
The asymmetric unit of the title compound, C(18)H(18)Cl(2)N(2)O(2), contains one half of an independent mol-ecule, the other half being generated via a centre of inversion at the mol-ecular centroid. In the crystal structure, mol-ecular chains are formed through non-classical C-H⋯ O hydrogen bonds between an axial H atom of the oxazine ring and the O atom of a neighbouring mol-ecule.
منابع مشابه
Synthesis of a new series of N,N'-dimethyltetrahydrosalen (H2[H2Me]salen) ligands by the reductive ring-opening of 3,3'-ethylene-bis(3,4-dihydro-6-substituted-2H-1,3-benzoxazines).
A new series of N,N'-bis(2'-hydroxy-5'-substituted-benzyl)-N,N -dimethylethane-1,2-diamines (N,N'-dimethyltetrahydrosalen) ligands were prepared in good yield by reduction of the respective 3,3'-ethylene-bis(3,4-dihydro-6-substituted-2H-1,3-benzoxazine) precursors with sodium borohydride . The ligands were characterized by IR, NMR, and elemental analysis, which showed the compounds to be consis...
متن کاملSynthesis and biological studies of triazolo-/thiadiazolo-benzoxazines.
Diethyl bromomalonate (2) with an equimolar amount of 2-aminophenol (1) in the presence of sodium fluoride undergoes a cyclization reaction to form 2H,4H-2-ethoxycarbonyl-3,4-dihydro-3-oxo-1,4-benzoxazine (3). Furthermore, compound 3 undergoes a condensation reaction with hydrazine hydrate in the presence of methanol to yield 2H,4H-2-hydrazinocarbonyl-3,4-dihydro-3-oxo-1,4-benzoxazine (4), whic...
متن کامل3,3′-(p-Phenylene)bis(3,4-dihydro-2H-1,3-benzoxazine)
Mol-ecules of the title compound, C(22)H(20)N(2)O(2), are situated on crystallographic centres of symmetry. The oxazinane ring adopts a sofa conformation. Mol-ecules are linked into cyclic centrosymmetric dimers via C-H⋯O hydrogen bonds with the motif R(2) (2)(6). In addition to the C-H⋯O inter-actions, the crystal structure is also stabilized by C-H⋯π inter-actions.
متن کامل3,3′-(Ethane-1,2-diyl)bis(6-methyl-3,4-dihydro-2H-1,3-benzoxazine)
The asymmetric unit of the title compound, C(20)H(24)N(2)O(2), contains one half-mol-ecule, which is completed by inversion symmetry. In the crystal, mol-ecular chains are formed through non-classical C-H⋯O hydrogen bonds, formed between axial H atoms of the oxazine ring and a O atom of a neighboring mol-ecule.
متن کاملSynthesis and Preliminary Bioassays of Some Bis -1,3 - Benzoxazines
Four previously synthesized (R =-F,-F,-CI,-Br,-l) and one new (R=-H) 3,3' -ethylene-bis(3,4-dihydro-6R-2H-1,3-benzoxa2Íne) were preliminary tested for insecticidal activity against M. domestica (Díptera) and C. cary (Lepidoptera) larvae. Under laboratory conditions no toxic action was observed. All larvae continued development and pupated successfully but internal or external malformations were...
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عنوان ژورنال:
دوره 66 شماره
صفحات -
تاریخ انتشار 2010