Syntheses of Highly Substituted Furan and Pyrrole Derivatives via Lithiated 3-Aryl-1-methoxyallenes: Application to the Synthesis of Codonopsinine
作者:Hans-Ulrich Reissig、Morshed Chowdhury
DOI:10.1055/s-2006-949622
日期:2006.9
with aldehydes, ketones, or imines to give allenyl ad- ducts, which cyclized to highly substituted heterocycles either un- der basic conditions or with silver nitrate assistance. Analogously, a dihydropyrrole derivative was obtained by the addition of anisyl- substituted lithiated methoxyallene derivative to an N-tosyl imine and subsequent cyclization of the intermediate. The two diaste- reomers obtained
An easy route to synthetic analogues of radicamine B, codonopsine and codonopsinine from d-mannitol
作者:Suresh Dharuman、Ashok Kumar Palanivel、Yashwant D. Vankar
DOI:10.1039/c4ob00503a
日期:——
A general strategy for the synthesis of analogues of radicamine B has been carried out fromD-mannitol. This method has been further extended to the synthesis of analogues of codonopsine and codonopsinine using appropriate Grignard reagents. The hence obtained molecules have been tested against various commercially available glycosidases and found to act as moderate to good inhibitors.