Synthesis and Evaluation of Some Coumarines1
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Kazi Mehraj AbukalamPharmaceutical Chemistry
Govt.college of Pharmacy,Aurangabad.
Guide Dr. V. K.Mourya
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Synthesis and evaluation of some coumarines
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ContentsNomenclatureCoumarins in natureBiological activities of coumarine comopundsLiterature survey
ArticlesPatents
Synthetic routesRole of catalystCurrent workFuture plan
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Nomenclature
O O
2 or alpha pyrone
O
O
4 or gamma pyrone
O OCoumarin benzo 1,2-pyrone
O
O
Chromone benzo 1,2- pyrone
O O2
35
6
78 1
4
• Pyrones
• Benzopyrones
• Numbering
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Biological activities of coumarines
AntimicrobialAntiinflammatoryAnticoagulantAntitumorAntiviralAntioxidantAntiallergicAntihypertensive
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Naturally occuring CoumarinOccurs in plants like tonka bean & sweet
clover,richest source plants of Rutaceae & Umbelliferae
O O
Esculetin
O OOH
Umbilliferone
OO O
OH
(+) Decursinol5
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Literature survey 4-Substituted coumarin posseses
antimicrobial,antiinflammatory,analgesic activity
7-Substituted coumarin having anticancer as well as antiviral activity
3-Substituted coumarin mainly posseses anticoagulant activity
Furocoumarin posseses antihypertensive activity
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Catalyst used in Pechmann Condensation
PO/molecular sieves Gallium triiodide Metal (II) complexesBiCl3 Vanadium(III)chloride (VCl3) Heterogeneous recyclable
catalyst(HClO4•SiO2) Titanium(IV)chlorideCerium(III)salt Bmim ionic solventPhosphotungstic acid (H3PW12O40)7
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Justification• Novelty
Coumarin : A new profile of biological Activity.Antimicrobial & Antimicrobial Activity
UsefulnessSynthesis of New Drug Molecules & their
derivativesTherapeutic activity against various disorders
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Practicability
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Synthetic route Synthesis of 4-Substituted methyl Coumarin f OH
R
+ BrCH2COCH2COOC2H5
Substituted Phenol Bromo ethylacetoacetate
O O
BrRConc.H2SO4
Substituted aniline135-138°c
O O
NHR
R2
Substituted 4-bromo coumarin
4-Substituted coumarin
R=7-OH, 7-CH3, 6-CH3,5,6-benz
R2= 4-Cl,3-nitro,2-carboxy,4-carboxy, 4-nitro,4-methyl10
room.temp.
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OO
HN Cl
4-((4-chlorophenylamino)methyl)-7-methyl-2H-chromen-2-one
OO
HN
NO2
4-((3-nitrophenylamino)methyl)-7-methyl-2H-chromen-2-one
OO
HN COOH
4-((7-methyl-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
OO
HN
4-((p-toluidino)methyl)-7-methyl-2H-chromen-2-one
4-chloro aniline
3-nitro aniline
PABA
Anthranilic acid
O O
Br
H3C
4-(bromomethyl)-7-methyl-2H-chromen-2-one
8 hrs
8 hrs
10hrs
8 hrs
Toludine
9 hrs
Acetonitrile
OO
HN
COOH
2-((7-methyl-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
MK1
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O O
Br
4-(bromomethyl)-6-methyl-2H-chromen-2-one
OO
HN Cl
4-((4-chlorophenylamino)methyl)-7-methyl-2H-chromen-2-one
OO
HN
NO2
4-((3-nitrophenylamino)methyl)-6-methyl-2H-chromen-2-one
OO
HN COOH
4-((6-methyl-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
OO
HN
4-((p-toluidino)methyl)-7-methyl-2H-chromen-2-one
4-chloro aniline
3-nitro aniline
PABA
Toludine
9 hrs
10 hrs
10 hrs
12 hrs
Acetonitrile
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O O
Br
HO4-(bromomethyl)-7-hydroxy-2H-chromen-2-one
OO
HN NO2
HO4-((4-nitrophenylamino)methyl)-7-hydroxy-2H-chromen-2-one
4-nitro aniline
Anthranilic acid
7 hrs
14 hrsO
O
HN
HO
COOH
2-((7-hydroxy-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
Acetonitrile
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O O
Br
4-(bromomethyl)-2H-benzo[g]chromen-2-one
OO
HN Cl
4-((4-chlorophenylamino)methyl)-2H-benzo[g]chromen-2-one
OO
HN
NO2
4-((3-nitrophenylamino)methyl)-2H-benzo[g]chromen-2-one
Acetonitrile
4-chloro aniline
3-nitro aniline
8 hrs
10 hrs
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Sr. No.
Compound Name Molecular Formula
MolecularWeight
Melting Point
Rf % Yield
M1 4-(bromomethyl)-7-methyl-2H-chromen-2-one
C11H9O2Br 253 1300C 0.4 93.75%
M2 4-(bromomethyl)-6-methyl-2H-chromen-2-one
C11H9O2Br 253 1700C 0.86 90.76%
M3 4-(bromomethyl)-7-hydroxy-2H-chromen-2-one
C10H7O3Br 255 110 0.45 85%
M4 4-(bromomethyl)-2H-benzo[g]chromen-2-one
C14H9O2Br 289 1620C 0.9 85.71%
MK1 4-((4-chlorophenylamino)methyl)-7-methyl-2H-chromen-2-one
C17H14NO2Cl 300 1600C 0.8 40%
MK2. 4-((3-nitrophenylamino)methyl)-7-methyl-2H-chromen-2-one
C17H14N2O4 310 1800C 0.6 50%
MK3. 4-((7-methyl-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
C18H15NO4 309 2600C 1.7 80% 15
Physicochemical Properties
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MK4. 4-((p-toluidino)methyl)-7-methyl-2H-chromen-2-one
C16H17NO2 279 188°C 0.72 76%
MK5. 2-((7-methyl-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
C18H15NO4 309 202°C 0.3 85%
MK6. 4-((4-chlorophenylamino)methyl)-6-methyl-2H-chromen-2-one
C17H14NO2Cl 300 220°C 0.9 90%
MK7. 4-((3-nitrophenylamino)methyl)-6-methyl-2H-chromen-2-one
C17H14N2O4 310 160°C 0.78 67%
MK8 4-((p-toluidino)methyl)-6-methyl-2H-chromen-2-one
C16H17NO2 279 218°C 0.79 64%
MK9 4-((6-methyl-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
C18H15NO4 309 260°C 1.2 68.85%
MK10. 4-((4-nitrophenylamino)methyl)-7-hydroxy-2H-chromen-2-one
C16H12N2O5 298 170°C 0.6 60%
MK11. 2-((7-hydroxy-2-oxo-2H-chromen-4-yl)methylamino)benzoic acid
C11H8ClNO 311 110°C 0.75 82%
MK12. 4-((4-chlorophenylamino)methyl)-2H-benzo[g]chromen-2-one
C20H14NO2Cl 335 210°C 0.8 61%
MK13. 4-((3-nitrophenylamino)methyl)-2H-benzo[g]chromen-2-one
C20H14N2O4 346 190°C 0.7 76%
Sr. No.
Compound Name Molecular Formula
MolecularWeight
Melting Point
Rf % Yield
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M1
O O
Br
H3C
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(785-540) -C-Br
3 1579.37(1690-1640) C-O
4 1547 (1600,1475) >C=C< (Aromatic)
5 690(690-710) Meta-substituted
6 1320(1375) -CH3
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O O
Br
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(785-540) -C-Br
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 (810-840) Para-substituted
7 (1375) -CH3
M2 4-bromo methyl, 6-methyl coumarin
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M3 4-(bromomethyl),7-hydroxy coumarin
O O
Br
HO
Sr.
No.
Frequency (cm-1) Functional
Group
1 1712.78(1690-1750) C=O
2 646.04(785-540) -C-Br
4. 1631(1690-1640) C-O
5. 1580 (1600,1475) >C=C< (Aro.)
6 700(690-710) meta-substituted
7 3612(3610-3640) -OH
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M4 4-(bromomethyl),5,6-benz coumarin
O O
Br
Sr. No. Frequency (cm-1) Functional
Group
1 1715.78(1690-1750) C=O
2 646.04(785-540) -C-Br
4. 1624.37(1690-1640) C-O
5. 1580 (1600,1475) >C=C< (Aro.)
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MK1
OO
HN Cl
Sr. No. Frequency (cm-1) Functional Group
1 1705.78(1690-1750) C=O
2 724.04(530-730) -C-Cl
4. 1656(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Arom)
6 690.10(690-710) meta-substituted
7 1325(1375) -CH3
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MK2
OO
HN
NO2
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(1515-1560)-C-NO2
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 815 (810-840) Para-substituted
7 (1375) -CH3
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MK3
OO
HN COOH
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(2500-3000) -C-COOH
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 827 (810-840) Para-substituted
7 (1375) -CH3
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MK4
OO
HN
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 1579.37(1690-1640) C-O
3. 1547 (1600,1475) >C=C< (Aromatic)
4 820(810-840) Para-substituted
5 1380(1375) -CH3
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OO
HN Cl
MK6
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(730-530) -C-Cl
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 812(810-840) Para-substituted
7 (1375) -CH3
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OO
HN
NO2
MK7
Sr.
No.
Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(1515-1560)-C-NO2
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 812(810-840) Para-substituted
7 1366(1375) -CH3
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OO
HN
MK8
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 1579.37(1690-1640) C-O
3. 1547 (1600,1475) >C=C< (Aromatic)
4 3400(3300-3500) N-H
5 (810-840) Para-substituted
5 (1375) -CH3
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OO
HN COOH
MK9
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 761.04(2500-3000) -C-COOH
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 (810-840) Para-substituted
7 (1375) -CH3
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MK10
OO
HN NO2
HO
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 1180-1360 -C-N
3 761.04(1515-1560)-C-NO2
4. 1579.37(1690-1640) C-O
5. 3420 (3300-3500) C-NH
6 815(810-840) Para-substituted
7 (3200-3400) -OH
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MK12
OO
HN Cl
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 730.04(530-730) -C-Cl
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 820(810-840) Para-substituted
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MK13
OO
HN
NO2
4-((3-nitrophenylamino)methyl)-2H-benzo[g]chromen-2-one
Sr. No. Frequency (cm-1) Functional Group
1 1686.78(1690-1750) C=O
2 1234(1180-1360) -C-N
3 761.04(1515-1560) -C-NO2
4. 1579.37(1690-1640) C-O
5. 1547 (1600,1475) >C=C< (Aromatic)
6 705(690-710) Meta-substituted
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Pending work Synthesis of 4-Substituted coumarin
derivative
Characterisation by UV,IR,MASS & NMR
Screening activity
Thesis writing
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ReferencesS.S. Furniss,A.H.Honnaford, vogel’s Textbook of
Organic Synthesis,5 th edition,1192.O.P.Agrawal, Chemistry of Organic Natural
Product,volume II,goel publishing house,Meerut 2001,627-628,686-715.
Kulkarni G.M., Synthesis and biological activities of some new fluorinated coumarins and 1-aza coumarins, European Journal of Medicinal Chemistry, 20 (2007) 1-11
B.China Raju ,H3P12W40 catalysed efficient synthesis of
4-Substituted coumarin,Indian journal of chemistry vol.48B January 2009,120-123
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M.V.Kulkarani,G.M.Kulkarani,C.H.Lin,C.M.Sun,Curr.Med.Chem.13(2006)2795-2818
M.V.Kulkarani,B.G.Pujar,V.D.Patil,Arch.Pharm.314(1983)15-23
Majunath Ghate,V.Kulkarani,R.Shobha,S.Y.Kattimani, European journal of medicinal chemistry38(2003)297-302
Imthyaz A.Khan,Manohar V. Kulkarani,Chung-Ming Sun European journal of medicinal chemistry 40(2005)1168-1172
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