A Sequence of Palladium-Catalyzed Borylation of Allyl Acetates with Bis(pinacolato)diboron and Intramolecular Allylboration for the Cyclization of Oxo-2-alkenyl Acetates
作者:Taka-aki Ahiko、Tatsuo Ishiyama、Norio Miyaura
DOI:10.1246/cl.1997.811
日期:1997.8
The cross-coupling reaction of bis(pinacolato)diboron with oxo-2-alkenyl acetates in toluene at 50 °C in the presence of Pd(dba)2/2 AsPh3 (3 mol%) to give allylboronates was followed by the intramolecularallylboration at 100 °C. The sequence provided cyclic homoallyl alcohols in high yields.
在 Pd(dba)2/2 AsPh3 (3 mol%) 存在下,双(频哪醇)二硼与氧代-2-烯基乙酸酯在甲苯中在 50 °C 的交叉偶联反应得到烯丙基硼酸酯,然后进行分子内烯丙基硼化在 100°C。该序列以高产率提供环状高烯丙醇。
Palladium-Catalyzed Annulation of Monosubstituted <i>β</i>-Diketones
作者:Frédéric Buono、Alphonse Tenaglia
DOI:10.1055/s-1998-1865
日期:1998.10
Various 4-methylenecyclohexanones and bridged bicyclo[3.n.1]alkanones (n = 2 or 3) are readily available via a palladium-catalyzed C,C-dialkylative cyclisation of monoalkylated β-diketones with allylic diacetate 1a (or dicarbonate 1b). A one-pot bicycloannulation/retro Claisen fragmentation leading to medium-sized cycloalkanones from monoalkylated cyclic β-diketones is described.