Highly regio-, diastereo-, and enantioselective [2 + 2 + 2] cycloaddition of 1,6-enynes with electron-deficient ketones catalyzed by a cationic RhI/H8-binap complex.
英文:
Highly regio-, diastereo-, and enantioselective [2 + 2 + 2] cycloaddition of 1,6-enynes with electron-deficient ketones catalyzed by a cationic RhI/H8-binap complex.
著者
和文:
Ken Tanaka,
Yousuke Otake,
Hiromi Sagac,
Keiichi Noguchi,
Masao. Hirano.
英文:
Ken Tanaka,
Yousuke Otake,
Hiromi Sagac,
Keiichi Noguchi,
Masao. Hirano.
A cationic RhI/H8-binap complex catalyzed regio-, diastereo-, and enantioselective [2 + 2 + 2] cycloaddn. of 1,6-enynes with electron-deficient ketones to form fused dihydropyrans contg. two quaternary carbon centers, e.g., I, is reported. Electron-rich aryl ketones react with 1,6-enynes in the presence of the same catalyst to give ortho-functionalized aryl ketones with excellent regio- and enantioselectivity. [on SciFinder(R)]
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