61692-84-0Relevant articles and documents
Asymmetric dihydroxylation of esters and amides of methacrylic, tiglic, and angelic acid: No exception to the sharpless mnemonic!
Weber, Fabian,Brückner, Reinhard
, p. 2428 - 2449 (2015/04/22)
Literature findings on the facial selectivity of the Sharpless asymmetric dihydroxylation (SAD) of isobutyl angelate are contradictory and partly in conflict with the Sharpless mnemonic. We systematically screened the SAD of esters and amides of angelic, tiglic, and methacrylic acid. Enantiocontrol arose in 14 of the 15 reactions, culminating at 99 % ee for the Weinreb amide of tiglic acid. The absolute configurations of all the nonracemic products were established by (stereo)chemical correlations. Without exception, they conform to the Sharpless mnemonic.
Peroxides as plant constituents. 6. Hydroperoxides from the blossoms of Roman camomile, Anthemis nobilis L
Ruecker,Mayer,Lee
, p. 821 - 826 (2007/10/02)
From the ethanol extract of the blossoms of Anthemis nobilis L. (syn. Chamaemelum nobile L.), six new hydroperoxides (1-6) were isolated, besides the known 1 beta-hydroperoxyisonobilin (7). The structures were elucidated by spectroscopic methods and in some cases ascertained by synthesis. Compounds 2 and 3 show a medium antibacterial activity.