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[ CAS No. 74936-72-4 ] {[proInfo.proName]}

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Chemical Structure| 74936-72-4
Chemical Structure| 74936-72-4
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Product Details of [ 74936-72-4 ]

CAS No. :74936-72-4 MDL No. :MFCD00475478
Formula : C16H16N2O6 Boiling Point : No data available
Linear Structure Formula :- InChI Key :JPXPPUOCSLMCHK-UHFFFAOYSA-N
M.W : 332.31 Pubchem ID :173322
Synonyms :
Chemical Name :5-(Methoxycarbonyl)-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic acid

Calculated chemistry of [ 74936-72-4 ]      Expand+

Physicochemical Properties

Num. heavy atoms : 24
Num. arom. heavy atoms : 6
Fraction Csp3 : 0.25
Num. rotatable bonds : 5
Num. H-bond acceptors : 6.0
Num. H-bond donors : 2.0
Molar Refractivity : 90.2
TPSA : 121.45 ?2

Pharmacokinetics

GI absorption : High
BBB permeant : No
P-gp substrate : No
CYP1A2 inhibitor : No
CYP2C19 inhibitor : No
CYP2C9 inhibitor : Yes
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -6.77 cm/s

Lipophilicity

Log Po/w (iLOGP) : 1.74
Log Po/w (XLOGP3) : 2.19
Log Po/w (WLOGP) : 1.71
Log Po/w (MLOGP) : 0.59
Log Po/w (SILICOS-IT) : -0.02
Consensus Log Po/w : 1.24

Druglikeness

Lipinski : 0.0
Ghose : None
Veber : 0.0
Egan : 0.0
Muegge : 0.0
Bioavailability Score : 0.56

Water Solubility

Log S (ESOL) : -3.14
Solubility : 0.244 mg/ml ; 0.000733 mol/l
Class : Soluble
Log S (Ali) : -4.37
Solubility : 0.014 mg/ml ; 0.0000422 mol/l
Class : Moderately soluble
Log S (SILICOS-IT) : -3.12
Solubility : 0.25 mg/ml ; 0.000752 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 2.0 alert
Leadlikeness : 0.0
Synthetic accessibility : 3.73

Safety of [ 74936-72-4 ]

Signal Word:Warning Class:
Precautionary Statements:P261-P305+P351+P338 UN#:
Hazard Statements:H302-H315-H319-H335 Packing Group:
GHS Pictogram:

Application In Synthesis of [ 74936-72-4 ]

* 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.

  • Downstream synthetic route of [ 74936-72-4 ]

[ 74936-72-4 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 74936-72-4 ]
  • [ 91599-74-5 ]
  • 2
  • [ 558-42-9 ]
  • [ 74936-72-4 ]
  • [ 890045-70-2 ]
YieldReaction ConditionsOperation in experiment
58% Example 1; l-Chloro-2-methyl-2-propyl methyl 1 ,4-dihydro-2,6-dimethyl-4-(3- nitrophenyl)- 1 -pyridine-3 , 5 -dicarboxylate; 31 g (0.26 moles) of thionyl chloride were added dropwise under stirring to a mixture of 78 g (0.235 moles) of 2,6-dimethyl-5-methoxycarbonyl-4- (3-nitrophenyl)-l,4-dihydropyridine-3-carboxylic acid, 420 ml methylene dichloride and 110 ml dimethyl formamide kept at temperature of -20C - +2° under nitrogen. After terminating the addition of the thionyl chloride the stirring was continued under nitrogen for a further hour. To the above mixture a solution of 26 g (0.24 moles) of l-chloro-2-methyl-2-propanol in 60 ml methylene dichloride was added dropwise while stirring under nitrogen at a temperature of -50C - O0C. The stirring was continued for 3 EPO <DP n="4"/>hours at O0C, afterwards the mixture was allowed to stand for 24 hours at room temperature. The solvent was evaporated under vacuum and the residue was dissolved in 1200 ml of ethylacetate. The organic solution was washed with saturated solution of sodium chloride and afterwards with a solution of 5percent Na2CO3. The organic layer was separated and dried with Na2SO4. The organic solution was evaporated to 500 ml and allowed to stand at O0C for 24 hours. The l-Chloro-2-methyl-2-prorhoyl methyl 1,4- dihydro-2,6-dimethyl-4-(3-nitrophenyl)-l-pyridine-3,5-dicarboxylate thus obtained was filtered and dried at 5O0C under vacuum. The weight was 58 g ( 58 percent yield) of about 98percent purity as determined by HPLC analysis, shown in Figure 1.The method for performing the HPLC was as follows:HPLC: Merck-Hitachi with autosamplerColumn: Symmetry C 18, 4,6 x 250mm (Waters)Detector: UV 237nmMobile Phase: 60percent Acetonitrile + 40percent buffer pH 4.0Flow rate: lml/minInjection Volume: 20mulTemparature: 3O0CThe buffer pH 4.0 was prepared by dissolving 5.14g potassium di- hydrogen phosphate and 2.4 ml triethylamine in 980 ml water with mixing. The pH of the solution was adjusted to 4.0 with phosphoric acid and distilled water was added to make 1 liter, and the solution was mixed.The product has the following 1H NMR Spectrum (300 MHz, CDCI3): 8.11 (lH,m), 8.04 (lH,m), 7.64 (lH,d, J=7.5Hz), 7.37 (lH,t, J=8.1Hz), 3.64 (3H,s), 2.97 (lH,s) 2.90 (lH,s) 2.35 (3H,s) 2.34 (3H,s), 1.47 (3H,s), 1.44 (3H,s).
  • 3
  • [ 14813-01-5 ]
  • [ 74936-72-4 ]
  • [ 91599-74-5 ]
YieldReaction ConditionsOperation in experiment
36.2% Under ultrasound, 10 g of dihydropyridine main ring , i.e.,[2,6-dimethyl -4-(3-nitrophenyl)-l ,4-dihydropyridine-3,5-dicarboxylic acid monomethyl ester] was placed into 200 mL reaction flask, and 14 mL Nu,Nu-dimethylformamide (DMF) and 56 mL dichloromethane was added. To the resultant homogeneous suspension was added 2.4 mL of thionyl chloride under ice-bath, then the mixture was stirred for 1 hour to obtain a clear solution.Then, 6.3 g of pyridine (alcohol) side chain, i.e., [l-benzyl-3 -hydroxypiperidine] was added and stirred for 2.5 hours under ice-bath.The reaction solution was washed with 40 mL water (x 4) and 40 mL saturated saline solution (x 1). The dichloromethane solution was dried for two hours by adding 4 g of anhydrous sodium sulfate. Then, sodium sulfate solid was removed by filtering, and dichloromethane was recycled under reduced pressure to obtain a yellow to red crude crystal (herein after referred to as crude crystal of benidipine hydrochloride). The crude crystal mentioned above was dissolved in 100 mL acetone, and ultrasounded at 150 W and 40 MHz for 7 minutes, filtered under reduced pressure and dried to obtain 5.9 g of crystal as yellow powder (yield 36.2%)
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; ;