Malathi, R. ; Kabaleeswaran, V. ; Rajan, S. S. ; Gopalakrishnan, Geetha ; Govindachari, T. R. (2003) Structure of azadirachtin-I, 11 β-H epimer Journal of Chemical Crystallography, 33 (4). pp. 229-232. ISSN 1074-1542
Full text not available from this repository.
Official URL: http://www.springerlink.com/content/w30527hp23544h...
Related URL: http://dx.doi.org/10.1023/A:1023816807690
Abstract
The 11 β-H epimer of Azadirachtin-I, isolated from the seed kernels of Azadirachta indica A. Juss (Neem), was characterized by both NMR and X-ray crystallographic techniques. NMR data reveals that the H11 proton is in β-orientation and the X-ray studies confirm this observation. The compound crystallized in space group P21 with the cell parameters a = 11.933(2) Å, b = 7.752(5) Å, c = 17.241(9) Å, β= 106.80(3)°. Though the structural features are similar to the 11 β-H epimer of Azadirachtin-H, the orientation of the acetoxy group at C3 is different. The dihedral angle C9-C8-C14-O13, which describes the relative orientation of the modified decalin and modified furan moities of the molecule, is 23.3(8)°.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer-Verlag. |
| Keywords: | Azadirachta Indica A Juss; Azadirachtin-i; 11 β-H Epimer; Crystal Structure |
| ID Code: | 15223 |
| Deposited On: | 13 Nov 2010 06:50 |
| Last Modified: | 01 Jun 2011 17:12 |
Repository Staff Only: item control page
