9-​Deacetylbaccatin VI

9-​Deacetylbaccatin VI

Common Name: 9-​Deacetylbaccatin VI

Synonyms: 7,​13-​Diacetyl-​9-​dihydrobaccatin III

CAS Registry Number: 188789-51-7

InChI: InChI=1S/C35H44O13/c1-17-23(44-18(2)36)15-35(42)30(47-31(41)22-12-10-9-11-13-22)28-33(8,29(40)27(46-20(4)38)26(17)32(35,6)7)24(45-19(3)37)14-25-34(28,16-43-25)48-21(5)39/h9-13,23-25,27-30,40,42H,14-16H2,1-8H3/t23-,24-,25+,27+,28-,29-,30-,33+,34-,35+/m0/s1

InChIKey: InChIKey=KVCYVYKYUBLZGW-RVNSTROOSA-N

Formula: C35H44O13

Molecular Weight: 672.72

Exact Mass: 672.2782

NMR Solvent: pyridine-d5

MHz: 400.0

Calibration: Residual solvent 8.71 ppm and 149.9 ppm for proton and carbon respectively.

NMR references: Zhang Hongjie, Mu Qing, Xiang Wei, Yao Ping, Sun Handong, and Takeda, Y. (1997). Intramolecular transesterified taxanes from Taxus yunnanensis. Phytochemistry 44, 911–915.

Species: Taxus

Notes:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
2 6.32 d 5.8
3 3.58 d 5.8
5 5.25 d 8.4
2.77 m
2.19 m
7 6.09 t 8.8
9 4.92 dd 10.7, 6.6
10 6.69 d 10.7
13 6.54 m
14 2.78 m
16 1.42 s
17 1.91 s
18 2.47 s
19 2.32 s
20a 4.54 s
20b 4.54 s
o-Ph 8.34
m-Ph 7.46
p-Ph 7.52
OAc-Me 2.26 s
OAc-Me 2.18 s
OAc-Me 2.16 s
OAc-Me 2.06 s
OH-9 6.33 d 6.6

Carbon NMR Peaks

Position PPM
1 78
2 74.3
3 47.8
4 82.3
5 84.3
6 35.3
7 73.4
8 46.5
9 75.3
10 74
11 136.5
12 139.2
13 70.6
14 36.9
15 44
16 28.5
17 23.7
18 15.3
19 14.1
20 76.7
Ph-C=O 166.3
q-Ph 131.1
o-Ph 130.4
m-Ph 128.9
p-Ph 133.4
OAc-C=O 170.9
OAc-C=O 170.3
OAc-C=O 170
OAc-C=O 169.7
OAc-Me 22.7
OAc-Me 21.7
OAc-Me 21.2
OAc-Me 21.2