Xia,CF (reprint author),Chinese Acad Sci,Kunming Inst Bot,State Key Lab Phytochem & Plant Resources West Ch,Kunming 650201,Yunnan,Peoples R China.
Synthetic endeavors toward (-)-chaetominine via copper-catalyzed radical cyclization are reported. Both of the pyrido[2,3,b]-indole ring (C ring) and imidazolidinone (D ring) are efficiently constructed in one-pot manner. It's unveiled that the newly formed stereo center is controlled by the chiral of alanine, not by tryptophan. With these synthetic discoveries, highly efficient and diastereoselective synthesis of (+)-2,3,14-epi-chaetominine 5 and (-)-11-epi-chaetominine 11 is achieved. (C) 2014 Elsevier Ltd. All rights reserved.
National Natural Science Foundation of China [21272242, 21302193]
; Yunnan High-End Technology Professionals Introduction Program [2010CI117]
; West Doctor Foundation of Chinese Academy of Sciences [292014312D11016]
; National Basic Research Program of China [2011CB915500]