Distal-Bond-Selective C−C Activation of Ring-Fused Cyclopentanones: An Efficient Access to Spiroindanones
作者:Ying Xia、Jianbo Wang、Guangbin Dong
DOI:10.1002/anie.201611642
日期:2017.2.20
A site‐selective rhodium‐catalyzed C−C activation of ring‐fused cyclopentanones was achieved to afford efficient access to a range of spiroindanones. The use of bulky 2‐amino‐6‐picoline as a cocatalyst is key to the excellent selectivity of this C−C bond cleavage in cyclopentanones.
Iridium-Mediated Isomerization−Cyclization of Bicyclic Pauson−Khand Derived Allylic Alcohols
作者:Yvonne Kavanagh、Cíara M. Chaney、Jimmy Muldoon、Paul Evans
DOI:10.1021/jo8017439
日期:2008.11.7
cyclopentenone, with a catalytic amount of (1,5-cyclooctadiene)(pyridine)(tricyclohexylphosphine)iridium(I) hexafluorophosphate 1 (Crabtree's catalyst) under a hydrogen atmosphere resulted in the formation of 4-(toluene-4-sulfonyl)-2-oxa-4-azatricyclo[5.2.1.0(3,8)]decane 12 as a single diastereoisomer. This process is likely to proceed via an initial Ir(I)-mediated isomerization of the alkene to form an N-sulfonyl
Tetramethyl Thiourea/Co<sub>2</sub>(CO)<sub>8</sub>-Catalyzed Pauson−Khand Reaction under Balloon Pressure of CO
作者:Yefeng Tang、Lujiang Deng、Yandong Zhang、Guangbin Dong、Jiahua Chen、Zhen Yang
DOI:10.1021/ol047651a
日期:2005.2.1
A Pauson-Khandtype of conversion of enynes to bicycliccyclopentenones employing the commercially available Co2(CO)8 and tetramethylthiourea (TMTU) as catalysts is described. This method allows a variety of enynes with diverse functional groups to be cyclized into cyclopentenones of interest. [reaction: see text]