Synthesis of a water-soluble cationic chiral diamine ligand bearing a diguanidinium and application in asymmetric transfer hydrogenation
作者： Yuanfu Tang , Xuefeng Li , Chunxia Lian , Jin Zhu , Jingen Deng
DOI: 10.1016/J.TETASY.2011.08.012
关键词:
摘要: Abstract A novel water-soluble cationic N-monosulfonated chiral diamine ligand diguanidinium 1c was easily prepared from (R,R)-DPEN and its rhodium complex successfully applied in the asymmetric transfer hydrogenation of prochiral ketones imines water by using sodium formate formic acid as co-hydrogen donors. Various substrates were reduced with high yields good to excellent enantioselectivities (up >99% ee).
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