Water-soluble palladium complexes with sulfonated diphosphines dpppts (1,3-bis[di(m-sodiumsulfonatophenyl)phosphino]propane), dppbts (1,4-bis[di(m-sodiumsulfonatophenyl)phosphino]butane), (S,S)-BDPPTS (2,4-bis[di(m-sodiumsulfonatophenyl)phosphino butane) and (R,R)-CBDTS (1,2-bis[di(m-sodiumsulfonatophenyl)phosphinomethyl]cyclobutane) are active in the hydrocarboxylation of vinyl arenes without addition of acid. The stability of the catalyst systems increases when the reaction is performed in an acidic medium and the catalysts could be recycled twice with no loss in activity or enantioselectivity in the case of the [Pd(OAc)(2)]/BDPPTS system. Enantioselectivities up to 43% are obtained. (C) 1999 Elsevier Science Ltd. All rights reserved.
机构:Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China
Gong, LZ
Chen, GS
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机构:Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China
Chen, GS
Mi, AQ
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Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R ChinaAcad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China
Mi, AQ
Jiang, YZ
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机构:Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China
Jiang, YZ
Fu, FM
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机构:Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China
Fu, FM
Cui, X
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机构:Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China
Cui, X
Chan, ASC
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机构:Acad Sinica, Chengdu Inst Organ Chem, Union Lab Asymmetr Synth, Chengdu 610041, Peoples R China