SYNTHESIS AND COORDINATION PROPERTIES OF CHIRAL BIDENTATE P,O-DONOR LIGANDS
Reaction of the chiral compound (S)-(+)-BrCH2CHMeCH2OH with Ph2PK in the presence of lithium diisopropylamide (LDA) and BH3/THF yields the monophosphine (S)-Ph2P(BH3)CH2CHMeCH 2OH(1). The reaction of 1 with ClOSO2Me/Et3N or NaH/MeI gives rise to the formation of the general compound (S)-Ph2P(BH3)CH2...
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| Autores principales: | , , |
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| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
2006
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072006000200008 |
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| Sumario: | Reaction of the chiral compound (S)-(+)-BrCH2CHMeCH2OH with Ph2PK in the presence of lithium diisopropylamide (LDA) and BH3/THF yields the monophosphine (S)-Ph2P(BH3)CH2CHMeCH 2OH(1). The reaction of 1 with ClOSO2Me/Et3N or NaH/MeI gives rise to the formation of the general compound (S)-Ph2P(BH3)CH2CHMeCH 2OR [Cp*IrCl2(PPh2CH2CHMeCH 2OR-P)], which by treatment with pyrrolidine affords (S)-Ph2PCH2CHMeCH2 OR [R = SO2Me (4), Me (6)]. The monophophines 4, 6 and (S)-PPh2CH2CHMeCH2 OH react with [{Cp*IrCl(µ-Cl)}2] to give the neutral compounds [Cp*IrCl2(PPh2CH2CHMeCH 2OR-P)], where only the compound with R = H (7) was fully characterized. Complex 7 reacts with AgBF4 yielding the cationic complex [Cp*IrCl(PPh2CH2CHMeCH2 OH-P,O)]BF4 (8) in which the ligand acts in its bidentate form. Similar synthetic results were obtained using [{Cp*IrI(µ-I)}2] as starting complex . |
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