Siedlecka; Skarzewski, Polish Journal of Chemistry, 2000, vol. 74, # 10, p. 1369 - 1374
作者:Siedlecka、Skarzewski
DOI:——
日期:——
A Facile Regioselective Decomposition of Tosylhydrazones: An Application towards the Synthesis of α-Lipoic Acid
作者:Subhash P. Chavan、Ramesh R. Kale、K. Pasupathy
DOI:10.1055/s-2005-865217
日期:——
A facile regioselective decomposition of tosylhydrazones using NaOH as a base in refluxing isopropyl alcohol is described. This finding has been successfully applied towards the synthesis of (±)-α-lipoic acid (1).
A method of making a hydroxyl-terminated thioketal diol is provided, the method comprising reacting a thioketal ester with a non-pyrophoric reducing agent to form a hydroxyl-terminated thioketal diol. The hydroxyl-terminated thioketal diol can be 2,2-(propane-2,2-diylbis(sulfanediyl)) diethanol. The non-pyrophoric reducing agent can be a sodium aluminum hydride, for example, sodium bis(2-methoxyethoxy)aluminum hydride. The thioketal ester can be dimethyl 2,2-(propane-2,2-diylbis(sulfanediyl)) diacetate. A biodegradable matrix prepared by reacting a hydroxyl-terminated thioketal diol with an isocyanate is provided. A method of making a biodegradable polyurethane composite is also provided.