A novel stereoselective synthesis of conjugated dienones
作者:Dawei Ma、Yingrui Lin、Xiyan Lu、Yihua Yu
DOI:10.1016/0040-4039(88)85331-0
日期:1988.1
(E,E)-α,β,-γ,δ-Dienones are synthesized stereoselectively from the corresponding α,β-ynones in high yield under the catalysis of a ruthenium hydride complex.
β-unsaturated ketones could be obtained by palladium-catalyzed ring-opening of mono-substituted cyclopropyl ketones efficiently and systematically. (E)-1-Arylbut-2-en-1-ones were generated from aryl cyclopropyl ketones stereoselectively in yields of 23–89% by the Pd(OAc)2/PCy3 catalytic system. The reaction exhibited stereoselectivity (only E products were found) and was suitable for both phenyl and
在此,我们报道通过钯催化的单取代环丙基酮的开环可以有效且系统地获得α,β-不饱和酮。( E )-1-Arylbut-2-en-1-ones 通过 Pd(OAc) 2 /PCy 3催化体系由芳基环丙基酮立体选择性生成,收率为 23-89% 。该反应表现出立体选择性(仅发现E产物)并且适用于苯基和杂芳基环丙基酮。
Molybdenum-mediated synthesis of isoxazole compounds through a nitrosyl insertion into a π-allyl ligand
作者:Shie-Hsiung Lin、Shie-Ming Peng、Rai-Shung Liu
DOI:10.1039/c39920000615
日期:——
The syntheses of compounds of the type CpMo(CO)2[η3-anti-1-CH2CH(OH)R-syn-3-Râ²CH2âC3H3] are described; their reactions with excess nitrosonium tetrafluoroborate produce 3-(1â²-Râ²CH2CHCH)-5-R-isoxazole, which involves a remarkable nitrosyl insertion into the Ï-allyl ligand as the key step.