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
Intramolecular etherification of five-membered cyclic carbonates bearing hydroxyalkyl groups
作者:Karolina M. Tomczyk、Piotr A. Guńka、Paweł G. Parzuchowski、Janusz Zachara、Gabriel Rokicki
DOI:10.1039/c2gc35265f
日期:——
We report a new one-pot syntheticroute to tetrahydrofuran derivatives, which were unexpectedly produced under basic conditions by intramolecular etherification of substituted five-membered cyclic carbonates. For alcohols with vicinal hydroxyl groups, and additional OH groups at the β-position, intramolecular etherification leading to 3-hydroxytetrahydrofuran derivatives was observed. These reactions