Direct Coupling of Catharanthine and Vindoline to Provide Vinblastine: Total Synthesis of (+)- andent-(−)-Vinblastine
نویسندگان
چکیده
منابع مشابه
Stereocontrolled total synthesis of (+)-vinblastine.
A stereocontrolled total synthesis of (+)-vinblastine was accomplished, featuring preparations of the two indole units by means of a novel indole synthesis via radical cyclization of thioanilide, and a stereoselective coupling of these units.
متن کاملSynthesis of fluorinated catharanthine analogues and investigation of their biomimetic coupling with vindoline.
The syntheses of 20,20-difluorocatharanthine and congeners, starting from the naturally occurring catharanthine, are reported. The fluorinated catharanthine analogues were investigated as potential precursors to dimeric Vinca alkaloids of the vinflunine family. However, the biomimetic coupling of the fluorinated catharanthine derivatives with vindoline led to unexpected alkaloid structures, the...
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چکیده ندارد.
A simplified procedure for indole alkaloid extraction from Catharanthus roseus combined with a semi-synthetic production process for vinblastine.
Dried leaves of Catharanthus roseus were extracted with aqueous acidic 0.1 M solution of HCl. Alkaloid-embonate complexes were obtained as precipitates by treating the extract with an alkaline (NaOH) solution of embonic acid (4,4-methylene-bis-3-hydroxynaphtalenecarboxylic acid). The precipitate mainly consisted of catharanthine and vindoline embonates and it was directly used as the starting m...
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کاتالیست یک سنتز جدید برای تیواترها توصیف شده است. واکنش الکل ها با آریل، هتروآریل و آلکیل تیو ل ها درحضور 1،3،5- تری آزو- 2،4،6- تری فسفرین-2،2،4،4،6،6 هگزاکلراید ((tapc به عنوان یک کاتالیست موُثر، بازده های خوب تا عالی از تیواترها را حاصل می کند. علاوه براین، واکنش تحت شرایط بدون فلز و بدون حلال پیش می رود، بنابراین یک مکمل جالب برای روش های شناخته شده سنتز تیواترها ارائه می دهد. یک مکانیسم ا...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2008
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja078192m