Methyl 2-amino-3,4,5,6-tetrafluorobenzoate
نویسندگان
چکیده
In the title compound, C(8)H(5)F(4)NO(2), synthesized by esterification of 2,3,4,5-tetra-fluoro-anthranilic acid with methanol, an intra-molecular amine N-H⋯O(carbon-yl) hydrogen bond is present, while inter-molecular N-H⋯O hydrogen bonds produce chains in the crystal, which extend along the b-axis direction.
منابع مشابه
Two hydration products of 3,4,5,6-tetrachloro-N-(methyl-2-pyridyl)phthalmic acids.
In 2-amino-6-methylpyridin-1-ium 2-carboxy-3,4,5,6-tetrachlorobenzoate, C(6)H(9)N(2)(+)·C(8)HCl(4)O(4)(-), there are two perpendicular chains of hydrogen-bonded ions, one arising from the interaction between 2-carboxy-3,4,5,6-tetrachlorobenzoate ions and the other from the interaction between the 2-amino-6-methylpyridin-1-ium and 2-carboxy-3,4,5,6-tetrachlorobenzoate ions. These chains combine ...
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The title compound, C(22)H(27)NO(11), was synthesized by the reaction of 4,5-diacet-oxy-6-acetoxy-methyl-3-amino-tetra-hydro-pyran-2-yl acetate and 2-hydr-oxy-3-methoxy-benzalde-hyde in ethanol. The mol-ecule contains two six-membered rings, one of which is in a chair conformation, and an intra-molecular O-H⋯N hydrogen bond is present.
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In the crystal structure of the title compound, CH(6)N(+)·C(9)H(3)Cl(4)O(4) (-), the N atom of the methyl-amine mol-ecule is protonated and hydrogen bonded to the carboxyl group of the 3,4,5,6-tetra-chloro-2-(meth-oxy-carbon-yl)benzoate anion. The anions are linked by the cations via inter-molecular N-H⋯O inter-actions into chains extending along the c axis.
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The mol-ecular structure of the title compound, C(19)H(20)O(2), reveals a slightly distorted chair conformation for the tetra-hydro-pyran ring with the two methyl and two phenyl substituents in equatorial positions.
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Two novel compounds, 2-methyl, 4-carboxy, 5-hydroxy-3,4,5,6-tetrahydropyrimidine (THP(A] and 2-methyl, 4-carboxy-3,4,5,6-tetrahydropyrimidine (THP(B] have been identified in the pool of Streptomyces parvulus by in vivo and in vitro studies. 13C and 15N were introduced into the compounds by feeding S. parvulus with 15N- and 13C-labeled L-glutamate. High resolution 13C and 15N NMR have been appli...
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