Home Crystal structure of 3-methyl-N-(pyrimidin-5-ylmethyl)pyridin-2-amine, C11H12N4
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Crystal structure of 3-methyl-N-(pyrimidin-5-ylmethyl)pyridin-2-amine, C11H12N4

  • Yun-Lian Shi , Xu-Liang Nie ORCID logo , Tao Huang , Jin-Hui Xie , Da-Yong Peng EMAIL logo , Xu-Gen Shi and Bao-Tong Li EMAIL logo
Published/Copyright: August 2, 2019

Abstract

[C11H12N4], triclinic, P1̄, a = 6.6939(10) Å, b = 8.8034(13) Å, c = 9.1140(13) Å, α = 97.749(2)°, β = 99.285(2)%, γ = 95.917(2)°, V = 520.90(13) Å3, Z = 2, Rgt(F) = 0.0381, wRref(F2) = 0.1030, T = 296(2) K.

CCDC no.: 1940076

The crystal structure is shown in the figure. Table 1 contains crystallographic data and Table 2 contains the list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Colorless block
Size:0.17 × 0.15 × 0.13 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:0.08 mm−1
Diffractometer, scan mode:Bruker APEX-II, φ and ω-scans
θmax, completeness:25.5°, >99%
N(hkl)measured, N(hkl)unique, Rint:3997, 1914, 0.024
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 1704
N(param)refined:138
Programs:Bruker programs [1], SHELX [2]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

AtomxyzUiso*/Ueq
N10.22652(15)0.30465(12)−0.08218(11)0.0459(3)
N20.03137(15)0.33502(13)0.10314(12)0.0509(3)
H2−0.07910.31100.13630.061*
N30.70141(17)0.32686(15)0.30310(14)0.0610(4)
N40.4954(2)0.26181(15)0.47924(13)0.0634(4)
C10.05619(17)0.25951(13)−0.03250(13)0.0402(3)
C2−0.09646(18)0.14156(14)−0.11425(14)0.0452(3)
C3−0.0631(2)0.07492(16)−0.25164(15)0.0567(4)
H3−0.1600−0.0021−0.31010.068*
C40.1129(2)0.12059(17)−0.30478(15)0.0587(4)
H40.13590.0749−0.39770.070*
C50.2507(2)0.23415(16)−0.21690(14)0.0513(3)
H50.36890.2648−0.25230.062*
C6−0.2837(2)0.09282(18)−0.05320(18)0.0609(4)
H6A−0.36790.0111−0.12350.091*
H6B−0.35850.1792−0.03790.091*
H6C−0.24460.05690.04090.091*
C70.6646(2)0.26637(18)0.42313(16)0.0623(4)
H70.77050.22210.47340.075*
C80.3451(2)0.32414(16)0.40451(15)0.0531(3)
H80.22280.32390.44060.064*
C90.36044(18)0.38898(13)0.27669(13)0.0414(3)
C100.5463(2)0.38793(15)0.23136(14)0.0497(3)
H100.56520.43190.14660.060*
C110.1842(2)0.45392(15)0.19308(14)0.0499(3)
H11A0.12130.51560.26490.060*
H11B0.23530.52150.12810.060*

Source of materials

The synthesis of 3-methyl-N-(pyrimidin-5-ylmethyl)pyridin-2-amine was carried out using 3-methylpyridin-2-amine and pyrimidine-5-carbaldehyde, using a modified literature known reaction [3], [4], [5], [6]. The 3-methylpyridin-2-amine (1.47 g, 15.62 mmol), pyrimidine-5-carbaldehyde (1.70 g, 15.72 mmol) and p-toluenesulfonic acid (0.1 g, 0.58 mmol) were added to the reaction flask with toluene as solvent. The mixture was refluxed for 4 h, then the toluene was removed under reduced pressure. 15 mL methanol was added for next step. And the sodium tetrahydroborate (0.6 g, 15.86 mmol) was slowly added to the above solution and then stirred at room temperature. The reaction was monitored by TLC. After completion of the reaction, the solvent was removed under reduced pressure. The products were extract with ethyl acetate and adjust pH to 7 with dilute hydrochloric acid. The residue was purified by column chromatography (ethyl acetate/Hexane = 1/1) to give title compound (1.3 g), Yield 45.33 %. The product was recrystallized from Acetone. m.p. 118 °C–120 °C. MS (ES I) m/z: 200.35. Elemental Anal.Calcd. (%) for C11H12N4: C, 65.98; H, 6.04; Found(%): C, 65.88; H, 5.99. 1H NMR (500 MHz, CDCl3) δ 9.10 (s, 1H), 8.75 (s, 2H), 7.99 (d, J = 4.7 Hz, 1H), 7.28 (d, J = 2.4 Hz, 1H), 6.60 (dd, J = 7.0, 5.2 Hz, 1H), 4.71 (d, J = 5.8 Hz, 2H), 4.59 (bs, 1H), 2.11 (s, 3H). 13C NMR (125 MHz, CDCl3) δ 157.47, 156.42, 155.75, 145.37, 137.17, 133.62, 116.62, 113.80, 40.75, 16.83.

Experimental details

All H atoms were included in calculated positions and refined as riding atoms, with C—H = 0.93 Å with Uiso(H) = 1.5 Ueq(C) for methyl H atoms and 1.2 Ueq(C) for all other H atoms.

Comment

Triflumezopyrim is a new type of mesoionic insecticide developed by DuPont. It can be used to control rice Delphacidae, Cicadellidaeetc, etc., especially for Nilaparvata lugens [7], [8]. 3-methyl-N-(pyrimidin-5-ylmethyl) pyridin-2-amine is an important intermediate for the synthesis of mesoionic compounds. The synthetic route was further optimized and then a series of triflumezopyrim analogs (which are mesoionic compounds) were synthesized, which are expected to have good biological activity [9], [10]. Herein we report the synthesis and crystal structure of 3-methyl-N-(pyrimidin-5-ylmethyl)pyridin-2-amine, which provides a more efficient synthesis method of such compounds.

There is one crystallographic independant molecules in the asymmtric unit (shown in the figure). In the molecule of the title compound bond lengths and angles are very similar to those given in the literature for pyrimidine derivatives [11], [12]. The dihedral angle of the pyrimidine plane and the pyridine plane is 72.778(334)°, 53.230(575)° and 57.419(610)°.

Funding source: China National Key R and D Program during the 13th Five-year Plan Period

Award Identifier / Grant number: 2017YFD0301604

Award Identifier / Grant number: 21562022

Award Identifier / Grant number: 20181BAB203015

Funding source: Research Foundation of Educational Department of Jiangxi Province

Award Identifier / Grant number: GJJ160379

Award Identifier / Grant number: GJJ180204

Funding statement: X-ray data were collected at Instrumental Analysis Center Nanchang Hangkong University, Nanchang, 330063, People’s Republic of China. This research has been supported by the China National Key R and D Program during the 13th Five-year Plan Period (Grant No. 2017YFD0301604), The National Natural Science Foundation of China (Grant No. 21562022), The Natural Science Foundation of Jiangxi Province (Grant No. 20181BAB203015), The Research Foundation of Educational Department of Jiangxi Province [No. GJJ160379, GJJ180204].

References

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Received: 2019-06-09
Accepted: 2019-07-12
Published Online: 2019-08-02
Published in Print: 2019-11-26

©2019 Yun-Lian Shi et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 Public License.

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