Carbonylation of trichloroacetaldehyde (chloral) in concentrated sulfuric acid: Stereocontrolled synthesis of cis- and trans-2,5-bis(trichloromethyl)-1,3-dioxolan-4-one
Carbonylation of trichloroacetaldehyde(chloral) in concentrated sulfuric acid readily gave 2,5-bis(trichloromethyl)-1,3-dioxolan-4-ones (cis and trans) and 3,3,3-trichloro-2-hydroxypropanoic acid. The cis isomer was isolated for the first time, and confirmed by Xray structural analysis. The cis/trans ratio of dioxolanones largely depended upon the concentration of sulfuric acid. Highly diastereoselective formation of the dioxolanones was achieved with 99wt% sulfuric acid (cis : trans = 95 : 5) or with 90wt% sulfuric acid (0 : 100).
Reisse, Justus Liebigs Annalen der Chemie, 1890, vol. 257, p. 335
作者:Reisse
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Grimaux; Adam, Chemische Berichte, 1877, vol. 10, p. 903
作者:Grimaux、Adam
DOI:——
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Grimaux; Adam, Bulletin de la Societe Chimique de France, 1880, vol. <2>34, p. 39