71697-48-8Relevant articles and documents
The Enantioselective Synthesis of Eburnamonine, Eucophylline, and 16′-epi-Leucophyllidine
Hayashida, Kohei,Korch, Katerina M.,Ngamnithiporn, Aurapat,Reimann, Christopher E.,Saito, Daisuke,Stoltz, Brian M.
supporting information, p. 17957 - 17962 (2021/07/12)
A synthetic approach to the heterodimeric bisindole alkaloid leucophyllidine is disclosed herein. An enantioenriched lactam building block, synthesized through palladium-catalyzed asymmetric allylic alkylation, served as the precursor to both hemispheres. The eburnamonine-derived fragment was synthesized through a Bischler–Napieralski/hydrogenation approach, while the eucophylline-derived fragment was synthesized by Friedl?nder quinoline synthesis and two sequential C?H functionalization steps. A convergent Stille coupling and phenol-directed hydrogenation united the two monomeric fragments to afford 16′-epi-leucophyllidine in 21 steps from commercial material.
A Radical Cascade Enabling Collective Syntheses of Natural Products
Wang, Xiaobei,Xia, Dongliang,Qin, Wenfang,Zhou, Ruijie,Zhou, Xiaohan,Zhou, Qilong,Liu, Wentao,Dai, Xiang,Wang, Huijing,Wang, Shuqing,Tan, Ling,Zhang, Dan,Song, Hao,Liu, Xiao-Yu,Qin, Yong
supporting information, p. 803 - 816 (2017/06/13)
Natural products have long been important inspirations for the development of chemical methodologies, theories, and technologies, and ultimately, discoveries of new drugs and materials. Chemical syntheses have traditionally yielded individual or small groups of natural products; however, methodology development allowing the synthesis of a large collection of natural products remains scarce. Here, we report an efficient photocatalytic radical cascade method that enables access to libraries of chiral and multiple-ring-fused tetrahydrocarbolinones. The radical cascade can controllably introduce complexity and functionality into products with excellent chemo-, regio-, and diastereoselectivity. The power of this distinct method has been demonstrated by the efficient syntheses of 33 monoterpenoid indole alkaloids belonging to four families.
Total synthesis of (+)-eburnamonine
Prasad, Kavirayani R.,Nidhiry, John E.
, p. 1477 - 1480 (2012/07/31)
The enantiospecific total synthesis of vinca alkaloid (+)-eburnamonine is accomplished from l-ethyl lactate. Key feature of the synthesis is the construction of the chiral quaternary center involving a Johnson-Claisen rearrangement and assembly of the pentacyclic core by the Pictet-Spengler reaction and ring-closing metathesis. Georg Thieme Verlag Stuttgart · New York.
