Rhodium perchlorate

The presence of copper(II) salts, in the optimum ratio Cu Rh=l or 2, considerably increases the rate and the selectivity of the reaction. Rhodium perchlorate alone acts as a catalyst, but cooxidizes the solvent alcohol to a carbonyl compound. With Cu Rh= 1, 85% of the copper precipitates from the reaction mixture as CuCl. 

Alternate Name (bicyclo[2.2.1]hepta-2,5-diene)(chiraphos)-rhodium perchlorate (norbomadiene)(chiraphos)rhodium perchlorate. 

BICYCLO[2.2.1]HEPTA-2,5-DlENE)[(2S,3S)-BIS(DIPHENYLPHOSPHINO)BUTANE]RHODIUM PERCHLORATE 75... 

Related Reagents. Bis(bicyclo[2.2.1 ]hepta-2,5-diene)rho-dium Perchlorate Bis(bicyclo[2.2.1]hepta-2,5-diene)rhodium Perchlorate-(i )-l-(5 )-l, 2-Bis(diphenylphosphino)ferrocenyl-ethanol 2,2 -Bis(diphenylphosphino)-l,r-binaphthyl Chloro-tris(triphenylphosphine)rhodium(I). 

Bicyclo[2.2.1 ]hepta-2,5-diene)[(25,35)-bis(diphenylphosphino)butane]rhodium Perchlorate... 

Bis(bicyclo[2.2. l]hepta-2,5-diene)-rhodium Perchlorate-(7 )-l-(S)-l, 2-Bis(diphenylphosphino)ferrocenylethanol,... 

Bicyclo[2.2.1 ]hepta-2,5-diene)[(25,35)-bis(diphenylphosphino)butane]rhodium Perchlorate, 74 (Bicyclo[2.2.1 ]hepta-2,5-diene)[ 1,4-bis(diphenylphosphino)butane]rhodium(I) Tetrafluoroborate, 76... 

The use of chiral Lewis acids for enantioselective Diels-Alder and hetero Diels-Alder reactions and for other processes of C—C bond formation has recently received great attention. Reetz and coworkers reported that a stoichiometric amount of the chiral Lewis acid (137) effectively promotes the reaction of silyl ketene acetal (98) to give the aldol product in 57% yield and 90% ee (equation 48, R = Me2CHCH2—). When a catalytic amount (5 mol %) of the chiral rhodium perchlorate (138) is used, the aldol product is obtained in >75% yield and 12% ee (equation 48 R = Ph). ° Both reactions probably proceed through the corresponding metal enolates. - The development of new efficient chiral catalysts for the Mukaiyama reaction is certainly one of the challenges of the 1990s. 

Kaduk JA, Ibers JA (1975) Crystal and molecular structure of dinitrosylbis (triphaiyl-phosphine)rhodium perchlorate, [Rh (N0)2(P(C6H5)3)2][C104]. Inorg Chem 14 307(1-3073... 

C43H3eClOioP2Rh, r7 -Toluenebis(triphenyl phosphite)rhodium perchlorate, 46B, 919... 

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