2390-99-0Relevant articles and documents
Catalase Involved in Oxidative Cyclization of the Tetracyclic Ergoline of Fungal Ergot Alkaloids
Yao, Yongpeng,An, Chunyan,Evans, Declan,Liu, Weiwei,Wang, Wei,Wei, Guangzheng,Ding, Ning,Houk,Gao, Shu-Shan
supporting information, p. 17517 - 17521 (2019/11/11)
A dedicated enzyme for the formation of the central C ring in the tetracyclic ergoline of clinically important ergot alkaloids has never been found. Herein, we report a dual role catalase (EasC), unexpectedly using O2 as the oxidant, that catalyzes the oxidative cyclization of the central C ring from a 1,3-diene intermediate. Our study showcases how nature evolves the common catalase for enantioselective C-C bond construction of complex polycyclic scaffolds.
Total Synthesis of (-)-Chanoclavine i and an Oxygen-Substituted Ergoline Derivative
Lu, Jia-Tian,Shi, Zi-Fa,Cao, Xiao-Ping
supporting information, p. 7774 - 7782 (2017/08/14)
An efficient and direct route to ergot alkaloid (-)-chanoclavine I (3) is described using the inexpensive compound (2R)-(+)-phenyloxirane (15) as a chiral pool in 13 steps with 17% overall yield. Key features of the synthesis include a palladium-catalyzed intramolecular aminoalkynylation of terminal olefin and a rhodium-catalyzed intramolecular [3 + 2] annulation. An oxygen-substituted ergoline derivative (-)-25 was also achieved by using the same strategy.
Simple total syntheses of (-)-ergot alkaloids and their (+)-enantiomers by a common synthesis method utilizing optical resolution
Somei, Masanori,Nakagawa, Kyoko
, p. 1263 - 1266 (2007/10/03)
The first and simple total syntheses of (-)-isochanoclavine-1 ((-)-1b), (-)-agroclavine ((-)-3), (-)-agroclavine-1 ((-)-4), and (-)-norchanoclavine-1 ((-)-5c) and their (+)-enantiomers are achieved from indole-3-carboxaldehyde (8) by a common synthesis method utilizing optical resolution. Absolute configuration of (-)-agroclavine-1 is determined to be 5R and 10S for the first time. Preparations of both enantiomers of chanoclavine-1 (1c) are also included.