Efficient convergent synthesis of a trans-fused 6-6-6-6-membered tetracyclic ether ring system
作者:Goh Matsuo、Hiroshi Hinou、Hiroyuki Koshino、Toshiro Suenaga、Tadashi Nakata
DOI:10.1016/s0040-4039(99)02173-5
日期:2000.2
A very efficient convergent strategy for the construction of the trans-fused 6-6-6-6-membered tetracyclic ether ring system was developed based on the acetylide-triflate coupling of two tetrahydropyrans, oxidation of the alkyne group to an α-diketone, double cyclization to 6,6,6,6-membered tetracyclic diacetal, and stereoselective reduction of the diacetal with Et3SiH–TMSOTf.
基于两个四氢吡喃的乙炔化物-三氟甲磺酸酯偶联,炔基氧化为α-二酮,开发了一种非常有效的收敛策略,用于构建反式6-6-6-6元四环醚环系统双环化成6,6,6,6元四环二缩醛,并用Et 3 SiH–TMSOTf立体选择性还原二缩醛。