350791-64-9Relevant academic research and scientific papers
Total synthesis of apratoxin A and B using Matteson's homologation approach
Andler, Oliver,Kazmaier, Uli
supporting information, p. 4866 - 4870 (2021/06/16)
Apratoxin A and B, two members of an interesting class of marine cyclodepsipeptides are synthesized in a straightforward mannerviaMatteson homologation. Starting from a chiral boronic ester, the polyketide fragment of the apratoxins was obtainedviafive su
Total synthesis of (-)-apratoxin A, 34-epimer, and its oxazoline analogue
Numajiri, Yoshitaka,Takahashi, Takashi,Doi, Takayuki
experimental part, p. 111 - 125 (2010/07/06)
A concise and convergent total synthesis of the highly cytotoxic marine natural product apratoxin A is accomplished by an 18-step linear sequence. The high sensitivity of the thiazoline, bearing an adjacent β-hydroxyl group at the C35-position, results in
Total synthesis of the cyclodepsipeptide apratoxin A and its analogues and assessment of their biological activities
Dawei, Ma,Zou, Bin,Cai, Guorong,Hu, Xiaoyi,Liu, Jun O.
, p. 7615 - 7626 (2007/10/03)
A novel total synthesis of apratoxin A is described, with key steps including the assembly of its ketide segment through a D-proline-catalyzed direct aldol reaction and Oppolzer's anti aldol reaction and the preparation of its thiazoline unit in a biomimetic synthesis. An oxazoline analogue of apratoxin A has also been elaborated by a similar approach. This compound has a potency against HeLa cell proliferation only slightly lower than that of apratoxin A, whilst a C(40)-demethylated oxazoline analogue of apratoxin A displays a much lower cytotoxicity and the C(37)-epimer and C(37) demethylation prod uct of this new analogue are inactive. These results suggest that the two methyl groups at C(37) and C(40) and the stereochemistry at C(37) are essential for the potent cellular activity of the oxazoline analogue of apratoxin A. Further biological analysis revealed that both synthetic apratoxin A and its oxazoline analogue inhibited cell proliferation by causing cell cycle arrest in the G1 phase.
Total synthesis of apratoxin A
Doi, Takayuki,Numajiri, Yoshitaka,Munakata, Asami,Takahashi, Takashi
, p. 531 - 534 (2007/10/03)
We have achieved a total synthesis of apratoxin A in which thiazoline formation was accomplished from the moCys containing amide 4 using PPh 3(O)/Tf2O. Deprotection of the Troc and allyl ester in 17, coupling with tripeptide 3, and d
Total synthesis of apratoxin A
Chen, Jiehao,Forsyth, Craig J.
, p. 8734 - 8735 (2007/10/03)
Apratoxin A, a cyclodepsipeptide isolated from cyanobacterial Lyngbya spp, has been synthesized. The total synthesis features stereocontrolled access to the novel polyketide and the late-stage installation of the sensitive 2,4-disubstituted thiazoline moi
