Flavon Novi
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NOVIANA MERY OBENU 1413200018
Flavonoids from the leaves and stems of Dodonaea Polyandra : A northern Kaanju medicinal plantBradley S. Simpson, David J. Claudie, Nick M. Smith, Jacobus P. GerberRoss A. McKinnon, Susan J. Semple
Dodonaea Polyandra
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ANALISA SENYAWA
HR ESI-MS
2 aromatik, 2 ikatan rangkap, 1 siklik2 aromatik, 1 karbonil, 1 ikatan rangkap, 1 siklik
[M+1]+ m/z 369,1329 (cal.369,1343) C21H20O6
Spektroskopi UV
Spektroskopi IR
- OH (3615 cm-1)
- C=O- (1654 cm-1)
- C=C- (1604 cm-1)
λmax = 355 nmλmax = 270 nm
Konyugasi π-π* dan n-π*
DBE ∑C-(∑H/2) + 121 – (20/2) + 1 = 11
Berdasakan penelitianSebelumnya melaporakan Bahwa Genus DodonaeaMengandung senyawa Flavon (Sachdev and Kulshreshtha,1982)
O
O
Kerangka Dasar flavon
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12,48
6,17 (d, 1,8)
6,36 (d, 1,8)
7,86 (d, 1,8)
6,87 (d, 8,4)
7,77 (dd, 8,4, 1,8)
3,75 (s)
3,34 (d, 7,2)
5,35 (t, 7,2)
1,77 (s)
1,73 (s)
OH
OCH3
H
H
H
H
H
Kesimpulan sementara berdasarkan DBE, UV dan IR, senyawa tersebut kemungkinan adalah kerangka flavanoid
C21H20O6 DBE = 11
H
H
H
H
H
OCH3
OH
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c, multi
159,9 qC
139,9 qC
180,5 qC
163,6 qC
100,3 CH
166,4 qC
95,2 CH
158,8 qC
106,4 qC
122,9 qC
131,5 CH
130,2 qC
159,9 qC
116,3 CH
129,2 CH
H(J in Hz)
29,6 CH2
123,8 CH
134,4 qC
26,5 CH3
18,4 CH3
61,0
C=O
C-OH
C-OH
C-OH
OCH3
13C-NMR DAN DEPT
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O
H
OH
H
HO
O
H
CH3H3C
H
HH
OH
H
HOCH3
4"5"
2"
3'
4'2'
3"
346
7 9
10
1"
1'2
ANALISIS DENGAN HMBC
O
CH3H3C
OHH
H
HOCH3
OOH
H
HO
H
5,7,4’ -trihidroksi-3’(3-methilbut-2-enil)-3-metoksi flavon