Antineoplastic Agents. 571. Total Synthesis of Bacillistatin 2
摘要:
The first total synthesis of bacillistain 2 (2) has been achieved in 24 steps and 22.9% overall yield, providing a quite efficient route with maximal convergence. Notable features of this approach include two successful applications of the Mitsunobu reaction during respective assemblies of key intermediates 22 and 27, successful employment of 2-methyl-6-nitrobenzoic anhydride (MNBA) in the formation by lactonization of a macrocyclic (36-membered) ring, and very flexible access to structural modifications of the bacillistatin-type cyclodepsipeptides.
Antineoplastic Agents. 571. Total Synthesis of Bacillistatin 2
作者:George R. Pettit、Shougang Hu、John C. Knight、Jean-Charles Chapuis
DOI:10.1021/np800607x
日期:2009.3.27
The first total synthesis of bacillistain 2 (2) has been achieved in 24 steps and 22.9% overall yield, providing a quite efficient route with maximal convergence. Notable features of this approach include two successful applications of the Mitsunobu reaction during respective assemblies of key intermediates 22 and 27, successful employment of 2-methyl-6-nitrobenzoic anhydride (MNBA) in the formation by lactonization of a macrocyclic (36-membered) ring, and very flexible access to structural modifications of the bacillistatin-type cyclodepsipeptides.
Antineoplastic Agents. 570. Isolation and Structure Elucidation of Bacillistatins 1 and 2 from a Marine <i>Bacillus silvestris</i><sup>,</sup>
作者:George R. Pettit、John C. Knight、Delbert L. Herald、Robin K. Pettit、Fiona Hogan、Venugopal J. R. V. Mukku、John S. Hamblin、Michael J. Dodson、Jean-Charles Chapuis
DOI:10.1021/np800603u
日期:2009.3.27
cyclodepsipeptide strongly inhibited growth of a human cancer cell line panel, with GI50’s of 10−4−10−5 μg/mL, and each compound was active against antibiotic-resistant Streptococcus pneumoniae. The structures were elucidated by a combination of X-ray diffraction and mass and 2D NMR spectroscopic analyses, together with chemical degradation.