Chirale Bisphosphane IX. Kationische Rhodium(I)-Komplexe mit (1S,2S)-Cyclopentan-1,2-diyl-bis(dialkylphosphan)-Liganden, [(1S,2S)-C5H8(PR2)2Rh(1,5-COD)]O3SCF3: Synthesen, Strukturen und katalytische Anwendungen
作者:Lutz Dahlenburg、Volker Kurth
DOI:10.1016/s0022-328x(99)00243-0
日期:1999.8
(2) by Grignard substitution. Combination of (1S,2S)-C5H8P(Cl)C8H15-cyclo}2 (4) with CH3MgBr or of (1S,2S)-C5H8P(H)C8H15-cyclo}2 (3) with n-C4H9Li and CH3I afforded (1S,2S)-C5H8P(CH3)C8H15-cyclo}2 (9) as diastereomeric mixtures containing the SP,SP', RP,RP', and RP,SP' stereoisomers 9a–c in different proportions. The optically active chelate ligands 5–9 reacted with [Rh(1,5-COD)2]O3SCF3 to give cationic
在烯丙醇或1,4-戊二烯中自由基引发的P-H(1 S,2 S)-C 5 H 8(PH 2)2(1)的加成产生了全烷基化的手性P 2配体(1 S,2 S)-C 5 H ^ 8 P(C 3 H ^ 6 OH)2 } 2(6)和(1小号,2小号)-C 5 H ^ 8(PC 5 ħ 10 -环)2(7)。(1 S,2 S)-C 5 H 8(PR 2)2类型的其他P烷基化双膦,其中PR 2 = P(C 4 H 9 - n)2(5)和P(C 6 H 11 -环)2(8)由(1 S,2 S)-C 5 H 8(PCl 2)2(2)由格利雅(Grignard)替代。(1组合小号,2小号)-C 5 H ^ 8 P(CL)C 8 H ^ 15 -环} 2(4)用CH 3 MgBr或(1小号,2小号)-C 5 H ^ 8 P (H)C 8 H ^ 15 -环} 2(3)与ñ -C 4 ħ 9 Li和CH 3我得到(1小号,2小号)-C