6279-84-1Relevant articles and documents
Facile access to chiral 4-substituted chromanes through Rh-catalyzed asymmetric hydrogenation
Tao, Lin,Zhao, Qingyang,Zhang, Xumu,Dong, Xiu-Qin
supporting information, p. 1859 - 1862 (2020/01/21)
Rh/ZhaoPhos-catalyzed asymmetric hydrogenation of a series of (E)-2-(chroman-4-ylidene)acetates was successfully developed to prepare various chiral 4-substituted chromanes with high yields and excellent enantioselectivities (up to 99percent yield, 98percent ee). Moreover, the gram-scale hydrogenation could be performed well in the presence of 0.02 molpercent catalyst loading (TON = 5000), the hydrogenation product was easily converted to access other important compounds, which demonstrated the synthetic utility of this asymmetric catalytic methodology.
Studies towards the stereoselective α-hydroxylation of flavanones. Biosynthetic significance
Border, Zola-Michele,Marais, Charlene,Bezuidenhoudt, Barend C. B.,Steenkamp, Jacobus A.
, p. 122 - 130 (2008/04/11)
The enolates of various propiophenones, chromanones, and also analogues of naturally occurring flavanones were stereoselectively hydroxylated at the ?-position, by employing commercially available enantiopure oxaziridines, to afford the desired ?-hydroxylated target molecules in good to exceptional stereoselectivities and in moderate to good chemical yields. A mechanistic rationale is presented to account for the stereoselectivities achieved. These in vitro results were tentatively related to the stereoselective biosynthesis of enantio-enriched dihydroflavonols while questions were raised about the authenticity of certain natural compounds. CSIRO 2008.
Synthesis and Nematicidal Activity of Phenoxypropionic Acid Derivatives
Hayashi, Masatoshi,Wada, Kojiro,Munakata, Katsura
, p. 2653 - 2656 (2007/10/02)
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