Home 5-Amino-2-chloro-4-fluoro-N-(N-isopropyl-N-methylsulfamoyl) benzamide, C11H15O3ClFN3S
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5-Amino-2-chloro-4-fluoro-N-(N-isopropyl-N-methylsulfamoyl) benzamide, C11H15O3ClFN3S

  • Wang Jie , Shu-Zhen Xiao , Huang Cong , Ya-Qiang Liu EMAIL logo and Da-Yong Peng ORCID logo EMAIL logo
Published/Copyright: April 20, 2023

Abstract

C11H15O3ClFN3S, triclinic, P 1 (no. 2), a = 7.8107(11) Å, b = 9.1644(13) Å, c = 11.3521(15) Å, α = 67.543(2)°, β =  72.776 ( 2 ) , γ =  88.529 ( 2 ) , V = 713.76(17) Å3, Z = 2, R g t (F) = 0.0385, w R r e f (F 2) = 0.1338, T = 296(2) K.

CCDC no.: 2251233

The molecular 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: 0.22 × 0.17 × 0.14 mm
Wavelength: Mo Kα radiation (0.71073 Å)
μ: 0.44 mm−1
Diffractometer, scan mode: Bruker APEX-II, φ and ω
θ max, completeness: 25.5°, 99%
N(hkl)measured, N(hkl)unique, R int: 5100, 2628, 0.018
Criterion for I obs, N(hkl)gt: I obs > 2σ(I obs), 2438
N(param)refined: 185
Programs: Bruker [1], SHELX [2, 3], Diamond [4]
Table 2:

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

Atom x y z U iso*/U eq
C1 0.1410 (3) 0.2849 (2) 0.17707 (19) 0.0341 (4)
C2 0.1640 (3) 0.2013 (2) 0.08355 (18) 0.0318 (4)
C3 0.2357 (3) 0.0560 (2) 0.09844 (19) 0.0333 (4)
C4 0.2599 (3) −0.0018 (2) −0.0012 (2) 0.0386 (5)
H4 0.3088 −0.0975 0.0073 0.046*
C5 0.2106 (3) 0.0845 (3) −0.1124 (2) 0.0412 (5)
C6 0.1395 (3) 0.2284 (3) −0.1333 (2) 0.0402 (5)
C7 0.1160 (3) 0.2841 (2) −0.0312 (2) 0.0367 (4)
H7 0.0665 0.3798 −0.0404 0.044*
C8 0.3471 (4) 0.5247 (3) 0.3190 (3) 0.0603 (7)
H8A 0.4492 0.5530 0.3394 0.090*
H8B 0.2420 0.5634 0.3624 0.090*
H8C 0.3689 0.5711 0.2238 0.090*
C9 0.5971 (5) 0.3228 (4) 0.2075 (4) 0.0822 (10)
H9A 0.5273 0.3374 0.1477 0.123*
H9B 0.6848 0.2502 0.1953 0.123*
H9C 0.6573 0.4229 0.1886 0.123*
C10 0.4737 (3) 0.2560 (3) 0.3511 (3) 0.0494 (6)
H10 0.4261 0.1484 0.3712 0.059*
C11 0.5726 (5) 0.2447 (5) 0.4497 (4) 0.0944 (12)
H11A 0.6182 0.3492 0.4337 0.142*
H11B 0.6710 0.1812 0.4388 0.142*
H11C 0.4915 0.1967 0.5394 0.142*
Cl1 0.31003 (7) −0.05650 (6) 0.23331 (5) 0.0456 (2)
F1 0.2336 (2) 0.0272 (2) −0.20975 (15) 0.0616 (4)
N1 0.0968 (4) 0.3111 (3) −0.2483 (2) 0.0675 (7)
H1A 0.1142 0.2734 −0.3092 0.081*
H1B 0.0526 0.4006 −0.2596 0.081*
N2 0.1042 (2) 0.19277 (19) 0.31098 (15) 0.0332 (4)
H2 0.0710 0.0934 0.3388 0.040*
N3 0.3185 (2) 0.35139 (19) 0.36715 (19) 0.0393 (4)
O1 0.1563 (3) 0.42838 (17) 0.13629 (16) 0.0509 (4)
O2 −0.0062 (2) 0.3760 (2) 0.43120 (18) 0.0515 (4)
O3 0.1046 (2) 0.12125 (19) 0.53781 (14) 0.0451 (4)
S1 0.12054 (6) 0.26391 (6) 0.42230 (4) 0.0331 (2)

1 Source of materials

2-Chloro-4-fluoro-N-(N-isopropyl-N-methylsulfamoyl)-5-nitrobenzamide (3.5 g, 10 mmol), NH4Cl (2.7 g, 50 mmol) were dissolved in water (30 mL) and iron powder (1.7 g, 30 mmol) was added in three batches and the resulting solution was stirred at 50 °C for 1 h. The reaction was monitored by TLC analysis until the starting material disappears completely. Followed by filtration, the filter cake was washed with CH2Cl2 (3 × 50 mL) and the filtrate extracted with CH2Cl2 (3 × 50 mL). The combined organic layers were washed three times with water (3 × 50 mL) and dried over anhydrous Na2SO4. The organic solvent was distilled under reduced pressure. At last, the reaction mixture was allowed to recrystallize from methanol to obtain the title product.

2 Experimental details

H atoms were included in calculated positions and refined as riding atoms, with C–H = 0.90–0.97 Å with U iso(H) = 1.5 U eq(C) for methyl H atoms and 1.2 U eq(C) for all other H atoms.

3 Comment

Benzylamide sulfonamide compounds, as an important intermediate in the synthesis of many drugs, have attracted the attention [5], [6], [7], [8]. For instance, Moss et al. [9] have reported the structure of 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide bentazon. Gentles et al. [10] have reported preclinical characterization of the cyclopropylindolobenzazepine BMS-791325, a potent allosteric inhibitor of the hepatitis C virus NS5B polymerase. Braga et al. [11] have explored the structure–properties relationships of two new polymorphic forms of the herbicide Bentazonthe; relative thermal stability of all forms, together with the effect of additives on the crystallization of one or a mixture of the three polymorphs. However, most of the compounds in these studies have benzoheterocyclic structures, while the reports on chain structure are rare. The important intermediate 5-amino-2-chloro-4-fluoro-N-(N-isopropyl-N-methylsulfamoyl)benzamide of herbicide saflufenacil was synthesized by us from 2-chloro-4-fluoro-N-(N-isopropyl-N-methylsulfamoyl)-5-nitrobenzamide.

In the molecules of the title structure bond lengths and angles are very similar to those given in the literature. In the title structure, the dihedral angles formed by the C2–C7 phenyl plane and the C1–O1–N2 amide plane is 31.1 . The torsion angles of C2–C1–N2–S1, C1–N2–S1–N3, N2–S1–N3–C8, N2–S1–N3–C10, S1–N3–C10–C9 and S1–N3–C10–C11 are 165.7 , 54.0 , 111.1 , 62.0 , 122.6 , and 122.417 ( 254 ) , respectively. Intermolecular N–H⋯O hydrogen bonds between the amino N atom [N(1)] and two sulfonyl O atoms [O(2) and O(3)] link the compounds into a 2D hydrogen bonded network.


Corresponding authors: Ya-Qiang Liu, Shaanxi Sunger Road Bio-Science Co., Ltd., Xian 710404, People’s Republic of China, E-mail: ; and Da-Yong Peng, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang/College of Chemistry and Material Science, Jiangxi Agricultural University, Nanchang 330045, People’s Republic of China, E-mail:

Acknowledgments

X-ray data were collected at Instrumental Analysis Center Nanchang Hangkong University, Nanchang, 330063, People’s Republic of China.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by the National Natural Science Foundation of China (32160660, 21562022), the Research Foundation of Jiangxi Provincial Drug Administration (2022-KJ03, 2021-KJ03).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

References

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Received: 2023-03-02
Accepted: 2023-03-23
Published Online: 2023-04-20
Published in Print: 2023-08-28

© 2023 the author(s), published by De Gruyter, Berlin/Boston

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

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