Stereoselectivity in the carbonyl insertion reaction between tetracarbonyldichlorodirhodium and substituted cyclopropanes

Catalysis of ring expansion of 1-methylcyclopropylmethanol to 1-methylcyclobutanol by rhodium(I)

“…is known to react with cyclopropanes to give rhodacyclobutanes (4), which may then undergo further interesting reactions (5)(6)(7), attempts were made to develop rhodium chemistry analogous to reaction [I]. The results of this study are described below.…”

“…The kinetic data are interpreted in terms of the mechanism of reactions [5] and [6] whereas, path B, rh~dac~clobutane intermediates are proposed slow and the mechanism is based on the platinum chemistry of (17)(18)(19).…”

Syntheses of bifunctionalized phosphine complexes via ruthenium promoted stepwise hydrophosphination, insertion, hydration, and hydroamination reactions

“…The intermolecular hydrophosphination of complex 3 and free diphenylphosphine was found to be very slow when the reaction was monitored by the 31…”

“…Selected 31 P and 1 H NMR data of 10a and 10b are given in Table 2-5. These NMR assignments are based on a series of 1 H, 31 The differences between the spectra of 10a and 10b, which are more important, are also clear. The 2D ROESY NMR spectrum of 10a shows the interactions between the two NMe groups and the coordinated benzene ligand (G, H).…”

“…When monitored by the 31 P{ 1 H} NMR spectroscopy, this reaction was found to be complete in 1 day at room temperature in dichloromethane. After the insertion, in CDCl 3 the 31…”