Palladium catalysed tandem cyclisation-anion capture processes. Part 3. Organoboron anion transfer agents
摘要:
The cyclisation-anion capture protocol has been applied to a wide range of starter and terminating species to effect regio-and stereo-specific mono-and bis-cyclisation processes in which a variety of organoboronderivatives function as anion transfer reagents. Direct capture (no cyclisation) is rarely a problem and it can usually be suppressed by modification of the reaction conditions. (C) 1997 Elsevier Science Ltd.
Palladium catalysed tandem cyclisation-anion capture processes. Part 3. Organoboron anion transfer agents
摘要:
The cyclisation-anion capture protocol has been applied to a wide range of starter and terminating species to effect regio-and stereo-specific mono-and bis-cyclisation processes in which a variety of organoboronderivatives function as anion transfer reagents. Direct capture (no cyclisation) is rarely a problem and it can usually be suppressed by modification of the reaction conditions. (C) 1997 Elsevier Science Ltd.
Palladiumcatalysed tandem cyclisation-anion capture processes initiated by oxidative addition of benzylic or allylic halides or acetates to Pd(O) occure regio- and stereo- specifically in good yield. Examples of “anion” capture involving formate (H−), and organo - tin, -zinc, and -boron species are described.