作者:Alexis Theodorou、Ierasia Triandafillidi、Christoforos G. Kokotos
DOI:10.1002/ejoc.201601144
日期:2017.3.17
A cheap, green and metal-free one-pot procedure for the dihydroxylation of alkenes is described. H2O2 was employed as the oxidant and 2,2,2-trifluoroacetophenone as the organocatalyst, leading to a highly sustainable protocol, where a variety of homoallylic alcohols, amino-alkenes and double bonds were converted into the corresponding polyalcohols in high to excellent yields. This manifold takes advantage
Picard,P.; Moulines,J., Bulletin de la Societe Chimique de France, 1974, p. 2889 - 2891
作者:Picard,P.、Moulines,J.
DOI:——
日期:——
Dibutyltin oxide mediated diastereoselective cyclodehydration/sulfonylation of 1,2,4-triols
作者:Makhosazana P. Gamedze、Comfort M. Nkambule
DOI:10.1016/j.tetlet.2015.02.083
日期:2015.4
Dibutyltin oxide (Bu2SnO) mediated cyclodehydration or sulfonylation of 1,2,4-triols is predictably diastereoselective depending on the steric bulk of the substituents at C4. A larger difference (Delta A-value >1 kcal/mol) leads to the syn-1,2,4-triols favouring cyclodehydration (78-85%) to form 3-hydroxytetrahydrofurans, with the anti-1,2,4-triols favouring monosulfonylation (66-87%). Triols from symmetrical ketones preferentially undergo cyclodehydration in high yield (>75%) due to a gem-disubstituent effect. Thus, the 1,2,4-triols derived from simple cyclic ketones also favour cyclodehydration to form spirocyclic 3-hydroxytetrahydrofurans in 72-79% yields. (C) 2015 Elsevier Ltd. All rights reserved.
Mazurewitsch, Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1914, vol. 46, p. 35
作者:Mazurewitsch
DOI:——
日期:——
Saizew, Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1912, vol. 44, p. 1015