292077-58-8Relevant articles and documents
New Pyridone Approach: Total Synthesis of Mappicine Ketone (Nothapodytine B)
Mekouar, Khalid,Genisson, Yves,Leue, Stefanie,Greene, Andrew E.
, p. 5212 - 5215 (2000)
A novel synthesis of mappicine ketone, which possesses strong selective activity against the herpes viruses HSV-1 and HSV-2, including those Acyclovir-resistant, and human cytomegalovirus (HCMV) has been efficiently accomplished. The synthesis highlights a new pyridone approach that effectively combines a double, intramolecular Michael addition in a conjugated ester-conjugated amide with oxidation-decarboxylation of the resulting piperidone.
Concise approach to mono- And disubstituted luotonin A analogs and their cytotoxicity test
Kagawa, Natsuko,Nishimura, Kimiko,Abe, Shinya,Masuko, Takashi,Toyota, Masahiro
, p. 514 - 522 (2019/07/31)
A concise approach for the preparation of luotonin A analogs has been developed. The new synthetic route contains an anion-assisted intramolecular double hetero Diels Alder reaction and a direct oxidative cross coupling reaction. Some synthetic luotonin A analogs show cytotoxic activities against Daudi and Jurkat human cancer cells as potent as camptothecin.
Total synthesis of mappicine ketone (nothapodytine B) by means of sulfur-directed 5-exo-selective aryl radical cyclization onto enamides
Kato, Issei,Higashimoto, Masayuki,Tamura, Osamu,Ishibashi, Hiroyuki
, p. 7983 - 7989 (2007/10/03)
Enamides 5, on treatment with Bu3SnH-AIBN, underwent aryl radical cyclization in a 5-exo manner to give 1-[bis(phenylthio)methyl]dihydroisoindoles 6, which were partially desulfurized with Bu3SnH-AIBN to give 1-mono(phenylthio)methyl
Preparation of camptothecin and of its derivatives
-
, (2008/06/13)
The present invention relates to a novel process for preparation of camptothecin and of its derivatives by convergent synthesis starting from a 3-(aminomethyl)quinoline derivative and 5-hydroxy-5-ethyl-6-oxo-5,6-dihydropyrancarboxylic acid and to the intermediates obtained.
Preparation of camptothecin and nothapodytine derivatives
-
, (2008/06/13)
The invention concerns the preparation of nothapodytine or camptothecin derivatives which consists in causing 4-ethyl 2methyl hepta-2,4-dienoic acid act on a 3-aminomethyl 2-bromo quinoline derivative (III) wherein R1and R2are H or R1is a halogen atom or alkyl, R2is a O—CO—X radical as defined for the camptothecin derivatives; or R1and R2are defined for the known camptothecin derivatives or represent protected radicals or radicals easily convertible into the radicals R1and R2, to obtain the quinoline derivative (IV); adding to the resulting quinoline derivative (2-methoxy carbonyl vinyl) tributyltin in the presence of a complex of palladium and triphenylarsin to obtain the quinoline derivative (V); cyclizing the resulting quinoline derivative to obtain the tetracyclic derivative (VI); then in subjecting said derivative to an ozonolysis followed by treatment with dimethyl sulphide to obtain the tetracyclic derivative (VII); saponification followed by decarboxylation in oxidising conditions of the resulting tetracyclic derivative to obtain the nothopodytine derivative (VIII); then optionally transforming the resulting derivative into a camptothecin derivative or into a mappicine derivative.