LaIII-Induced Addition of Tetrahydrofurfuryl Alcohol, Tetrahydropyran-2-ylmethanol, D-Gluconate, Methanol and Ethanol to Maleate.
摘要:
La-IIII-mediated Michael-type addition of tetrahydrofurfuryl alcohol (thfa) and tetrahydropyran-2-ylmethanol (thpm) to maleate 1, to form the corresponding alkoxybutanedioic acids in high yields (>89%) is described. Small amounts (<5%) of the products from competitive addition of water were formed when hydrated salts were used. Larger amounts of water interfere with this reaction. The extension of this reaction to D-gluconate 3, methanol and ethanol, to prepare 2-[(D-gluconate)-2-O-yl]butanedioate 4, methoxybutanedioic acid 2e and ethoxy-butanedioic acid 2f, has also been achieved.
Ligand-Directed Control over Crystal Structures of Inorganic-Organic Frameworks and Formation of Solid Solutions
作者:Hamish H.-M. Yeung、Wei Li、Paul J. Saines、Thomas K. J. Köster、Clare P. Grey、Anthony K. Cheetham
DOI:10.1002/anie.201300440
日期:2013.5.17
Grounded in fact: Inorganic–organicframeworks with 3D Li–O–Li connectivity can form solidsolutions through mechanochemical synthesis. High‐resolution synchrotron powder X‐ray diffraction and cross‐polarization solid‐state NMR spectroscopy demonstrate complete ligand mixing in the resulting binary and ternary systems (see picture for trends in unit cell volume (V) of the ternary system Li2(suc)x(mal)y(met)z}n)