Synthetic studies toward verrucarol. 2. Synthesis of the AB ring system

1980 ◽  
Vol 45 (24) ◽  
pp. 4825-4830 ◽  
Author(s):  
George A. Kraus ◽  
Bruce Roth
Synlett ◽  
2021 ◽  
Author(s):  
Yuki Yukutake ◽  
Takahiro Hiramatsu ◽  
Ryusei Itoh ◽  
Kazutada Ikeuchi ◽  
Takahiro Suzuki ◽  
...  

Synthetic studies on an ABC-ring model of Tubiferal A, a triterpenoid isolated from the fruit bodies of the Tubifera dimorphotheca myxomycete, are described. The stereogenic centers at the angular positions were constructed through the stereoselective addition of a C-ring allylborane followed by an Eschenmoser–Claisen rearrangement reaction prior to the formation of the AB-ring system by a double intramolecular alkylation reaction of a dichloro nitrile intermediate.


Heterocycles ◽  
2014 ◽  
Vol 89 (2) ◽  
pp. 353 ◽  
Author(s):  
Hajime Yokoyama ◽  
Yoshiro Hirai ◽  
Yasuhiro Kusumoto ◽  
Koshiro Sumiyoshi ◽  
Masahiro Miyazawa

1980 ◽  
Vol 45 (24) ◽  
pp. 4820-4825 ◽  
Author(s):  
George A. Kraus ◽  
Kevin Frazier

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