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  • Remote C-H activation via through-space palladium and rhodium migrations.

Remote C-H activation via through-space palladium and rhodium migrations.

Topics in current chemistry (2010-01-01)
Feng Shi, Richard C Larock
ABSTRACT

The catalytic activation of a C-H bond is a fundamentally important organic transformation. There are now numerous reports of palladium-mediated C-H activation by the through-space interaction of a palladium center with a neighboring C-H bond. This type of C-H activation can lead to a net "palladium migration" from the carbon atom where the palladium is first introduced to a remote carbon atom where C-H activation occurs. This process provides a novel method to introduce a palladium moiety into a position where direct palladium introduction may not be straightforward. This process is accompanied by concurrent migration of a hydrogen atom in the direction opposite to that of the palladium migration. Analogous rhodium migrations have also been reported. In this account, different types of palladium and rhodium migrations are reviewed and the reaction mechanism is discussed.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Rhodium, powder, 99.95% trace metals basis
Pricing and availability is not currently available.
Rhodium, wire reel, 0.05m, diameter 0.5mm, as drawn, 99.9%
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Rhodium, foil, not light tested, 10x10mm, thickness 0.012mm, as rolled, 99.9%
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Rhodium, wire reel, 0.05m, diameter 0.25mm, hard, 99.9%
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Rhodium, foil, light tested, 25x25mm, thickness 0.075mm, as rolled, 99.9%
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Rhodium, foil, 25x25mm, thickness 0.1mm, as rolled, 99.9%
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Rhodium, foil, not light tested, 25x25mm, thickness 0.0005mm, permanent polyester support, 99.85%
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Rhodium, microfoil, disks, 25mm, thinness 0.1μm, specific density 124μg/cm2, permanent mylar 3.5μm support, 99.9%
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Rhodium, foil, not light tested, 25x25mm, thickness 0.012mm, as rolled, 99.9%
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Rhodium, wire reel, 0.1m, diameter 1.0mm, as drawn, 99.9%
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Rhodium, wire reel, 0.05m, diameter 0.12mm, as drawn, 99.9%
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Rhodium, foil, light tested, 25x25mm, thickness 0.05mm, as rolled, x-ray quality, 99.9%
Pricing and availability is not currently available.
Rhodium, wire reel, 0.2m, diameter 0.12mm, as drawn, 99.9%
Pricing and availability is not currently available.
Rhodium, foil, light tested, 25x25mm, thickness 0.05mm, as rolled, 99.9%
Pricing and availability is not currently available.
Rhodium, foil, not light tested, 50x50mm, thickness 0.00025mm, permanent polyester support, 99.9%
Pricing and availability is not currently available.
Rhodium, foil, not light tested, 50x50mm, thickness 0.00075mm, permanent polyester support, 99.85%
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Rhodium, wire reel, 0.2m, diameter 0.25mm, hard, 99.9%
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Rhodium, foil, 25x25mm, thickness 0.125mm, as rolled, 99.9%
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Rhodium, foil, light tested, 15x15mm, thickness 0.05mm, as rolled, 99.9%
Pricing and availability is not currently available.
Rhodium, foil, not light tested, 25x25mm, thickness 0.006mm, as rolled, 99.9%
Pricing and availability is not currently available.
Rhodium, microfoil, disks, 10mm, thinness 0.1μm, specific density 124μg/cm2, permanent mylar 3.5μm support, 99.9%
Pricing and availability is not currently available.
Rhodium, wire reel, 0.5m, diameter 0.12mm, as drawn, 99.9%
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Rhodium, foil, not light tested, 25x25mm, thickness 0.00025mm, permanent polyester support, 99.9%
Pricing and availability is not currently available.
Rhodium, foil, not light tested, 25x25mm, thickness 0.00075mm, permanent polyester support, 99.85%
Pricing and availability is not currently available.
Rhodium, wire reel, 0.05m, diameter 1.0mm, as drawn, 99.9%
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Rhodium, wire reel, 0.5m, diameter 0.25mm, hard, 99.9%
Pricing and availability is not currently available.
Rhodium, foil, not light tested, 25x25mm, thickness 0.001mm, permanent polyester support, 99.85%
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Rhodium, wire reel, 0.1m, diameter 0.12mm, as drawn, 99.9%
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Rhodium, microfoil, disks, 10mm, thinness 0.50μm, specific density 620μg/cm2, permanent mylar 3.5μm support, 99.99%
Pricing and availability is not currently available.
Rhodium, wire reel, 0.1m, diameter 0.25mm, hard, 99.9%
Pricing and availability is not currently available.