Structure of 2-Chloro-6-hydroxybenzaldehyde
CAS No.: 18362-30-6
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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Raaginie Tamil Segaran ; Chean Hui Ng ; Mohd Fadhlizil Fasihi Mohd Aluwi ; Kok Wai Lam ; Khozirah Shaari ; Mazura Md Pisar
Abstract: The synthesis of prenylated or geranylated acylphloroglucinol-based xanthenones with 15.1-36.9% yield was achieved via aldol condensation of 2,4,6-trihydroxy-3-prenylacetophenone (tHPA) or 2,4,6-trihydroxy-3-geranylacetophenone (tHGA) and 2-hydroxybenzaldehyde derivatives in the presence of lithium bis(trimethylsilyl)amide (LiHMDS) as deprotonating agent. This study is one of the first to report on the synthesis of xanthenones using strong non-nucleophilic base catalyst, and the described synthesis not only achieved a compound with a natural product skeleton but also formed in a simple and environmentally friendly specificity.
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Keywords: Acylphloroglucinol-based xanthenone ; LiHMDS base catalyst ; Aldol condensation ; Natural product skeleton ; Eco-friendly
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CAS No. : | 18362-30-6 |
Formula : | C7H5ClO2 |
M.W : | 156.57 |
SMILES Code : | ClC1=C(C=O)C(=CC=C1)O |
MDL No. : | MFCD01646166 |
InChI Key : | MVTWVXYIKIVAOJ-UHFFFAOYSA-N |
Pubchem ID : | 528393 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H332-H335 |
Precautionary Statements: | P280-P305+P351+P338-P310 |
Num. heavy atoms | 10 |
Num. arom. heavy atoms | 6 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 38.86 |
TPSA ? Topological Polar Surface Area: Calculated from |
37.3 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
1.66 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.21 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.86 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.39 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
2.14 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.85 |
Log S (ESOL):? ESOL: Topological method implemented from |
-2.58 |
Solubility | 0.411 mg/ml ; 0.00262 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-2.63 |
Solubility | 0.369 mg/ml ; 0.00236 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-2.37 |
Solubility | 0.663 mg/ml ; 0.00424 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
Yes |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
Yes |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-5.69 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
1.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.1 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | Potassium hydroxide (10 g) was added slowly to a stirred solution of 2-chloro-6-fluoro- benzaldehyde (14.0 g, 88.3 mmol) in dimethylsulfoxide (20 mL) at 0°C, the reaction mixture was warmed to room temperature and stirred for 18 h. The reaction mixture was diluted with water (100 mL) and acidified to pH 2 with concentrated HCl. The precipitates were filtered, washed with water (2x100 mL) and dried over anhydrous sodium sulfate, to give a residue which was used directly in the next step. Yield: 8.5 g (62percent). H NMR (400 MHz, CDCI3) delta ppm 6.85 - 7.02 (m, 2H) 7.39 - 7.47 (m, 1H) 10.41 (s, 1H) 11.95 (s, 1H). | |
61% | 2-chloro-6-hydroxybenzaldehyde To a solution of 2-chloro-6-fluorobenzaldehyde (2.44 g, 15.4 mmol) in DMSO (20 mL) at 0° C. was added potassium hydroxide (2.23 g, 33.8 mmol) slowly. The reaction mixture was allowed to stir and warm to rt overnight and then diluted with water (65 mL). The mixture was acidified to pH<1 with conc. HCl. A white solid formed and was filtered, washed with water, and dried to give 2-chloro-6-hydroxybenzaldehyde (1.48 g, 61percent). LCMS: (FA) ES-155.0. | |
With potassium hydroxide; In water; dimethyl sulfoxide; | Step D Synthesis of 6-chlorosalicylaldehyde as an intermediate A stirred solution of 40.0 grams (0.252 mole) of 2-chloro-6-fluorobenzaladehyde in 300 mL of dimethylsulfoxide was cooled to 15° C., and 36.6 grams (0.555 mole) of powdered 85percent potassium hydroxide was added portionwise at a rate to maintain the reaction mixture temperature below 25° C. Upon completion of addition, the reaction mixture was stirred at ambient temperature for 18 hours. After this time the reaction mixture was poured into 1000 mL of water and was acidified with concentrated hydrochloric acid, with stirring. The resultant solid was collected by filtration, washed with water, and dried to yield 30.1 grams of 6-chlorosalicylaldehyde; m.p. 50°-52° C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Illustrative but nonlimiting examples of compounds of the formula (III) according to the present invention are:...6-naphthyl-2-hydroxybenzaldehyde, 6-adamanthyl-2-hydroxybenzaldehyde, 6-norbornyl-2-hydroxybenzaldehyde, 6-fluoro-2-hydroxybenzaldehyde, 6-chloro-2-hydroxybenzaldehyde, 3,4,5,6-tetrafluoro-2-hydroxybenzaldehyde, 3,4,5,6-tetrachloro-2-hydroxybenzaldehyde, 3,5,6-trifluoro-2-hydroxybenzaldehyde, ... |
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