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Lanthanum(III) Isopropoxide Catalyzed Chemoselective Transesterification of Dimethyl Carbonate and Methyl Carbamates

Lanthanum(III) Isopropoxide Catalyzed Chemoselective Transesterification of Dimethyl Carbonate and Methyl Carbamates

Manabu Hatano, Sho Kamiya, Katsuhiko Moriyama, Kazuaki Ishihara

Org Lett. 2011 Feb 4;13(3):430-3.

PMID: 21175159

Abstract:

A practical transesterification of less reactive dimethyl carbonate and much less reactive methyl carbamates with primary (1°), secondary (2°), and tertiary (3°) alcohols was established with the use of a lanthanum(III) complex, which was prepared in situ from lanthanum(III) isopropoxide (3 mol %) and 2-(2-methoxyethoxy)ethanol (6 mol %). In particular, corresponding carbonates and carbamates obtained were of synthetic utility from the viewpoint of the selective protection and/or deprotection of 1°-, 2°-, and 3°-alcohols.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP19446527	Lanthanum(III) isopropoxide		19446-52-7	Price

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