Synthetic studies toward penitrem E: enantiocontrolled construction of B-E rings
Synthetic studies toward penitrem E: enantiocontrolled construction of B-E rings
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Penitrem E 的合成研究:B-E 环的对映体控制结构
DOI:
10.1039/c4cc08505a
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发表时间:
2015
影响因子:
4.9
通讯作者:
and Hidetoshi Tokuyama
中科院分区:
文献类型:
--
作者:
Yu Yoshii;Takanori Otsu;Norihiko Hosokawa;Kiyosei Takasu;Kentaro Okano;and Hidetoshi Tokuyama
Enantiocontrolled construction of B–E rings of penitrem E was accomplished from 4-iodoindole in 13 steps with an overall yield of 1.7%. Diastereoselective Tf2NH-catalyzed (2+2)-cycloaddition between silyl enol ether and methyl acrylate furnished a tetracyclic product possessing the characteristic cyclobutane ring bearing a hydroxyl group.