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Lanthanum(III) triflate catalyzed direct amidation of esters.

Lanthanum(III) triflate catalyzed direct amidation of esters.

Organic letters (2014-03-26)

Hiroyuki Morimoto, Risa Fujiwara, Yuhei Shimizu, Kazuhiro Morisaki, Takashi Ohshima

ABSTRACT

Lanthanum trifluoromethanesulfonate is an effective single-component catalyst for synthesizing a variety of amides directly from esters and amines under mild conditions. Highly selective amidation of esters and amines, as well as catalyst-controlled amidation of esters, demonstrated the effectiveness of the catalyst system.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Ethyl 6-chloropyridine-3-carboxylate, 97%

Sigma-Aldrich

Lanthanum, pieces

Sigma-Aldrich

Lanthanum, powder, −40 mesh, under oil, 99.9% trace rare earth metals basis

Lanthanum, foil, 25x25mm, thickness 0.1mm, as rolled, 99%

Lanthanum, foil, 50x50mm, thickness 0.1mm, as rolled, 99%

Lanthanum, rod, 50mm, diameter 6.35mm, cast, 99%

Lanthanum, foil, 100x100mm, thickness 0.125mm, as rolled, 99%

Lanthanum, rod, 100mm, diameter 6.35mm, cast, 99%

Lanthanum, foil, not light tested, 25x25mm, thickness 0.025mm, as rolled, 99%

Lanthanum, foil, not light tested, 50x50mm, thickness 0.025mm, as rolled, 99%

Lanthanum, foil, 100x100mm, thickness 0.1mm, as rolled, 99%

Lanthanum, foil, 50x50mm, thickness 0.125mm, as rolled, 99%

Lanthanum, foil, 25x25mm, thickness 0.125mm, as rolled, 99%

Lanthanum, foil, not light tested, 100x100mm, thickness 0.025mm, as rolled, 99%