Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane, is researched, Molecular C19H18N2O2, CAS is 132098-59-0, about Synthesis and chiroptical properties of enantiomerically pure bis- and trisadducts of C60 with an inherent chiral addition pattern.Recommanded Product: Bis((S)-4-phenyl-4,5-dihydrooxazol-2-yl)methane.
In this paper we describe facile access to enantiomerically pure bis- and trisadducts of C60 with four different inherent chiral addition patterns, namely fC- and fA-I,II* (trans-2), fC- and fA-I,III* (trans-3), fC- and fA-I,III*,III* (trans-3,trans-3,trans-3) and fC- and fA-I,eI,eII (e,e,e), obtained by cyclopropanation of [6,6] double bonds with C2-sym. bisoxazolines and subsequent chromatog. separation of the corresponding diastereomers on achiral stationary phases. The CD spectra of the related pairs of diastereomers, whose addition patterns represent pairs of enantiomers, reveal pronounced Cotton effects and mirror-image behavior. It is the chiral arrangement of the conjugated π-electron system within the fullerene core itself that predominantly determines the chiroptical properties. We show that the magnitude of the Cotton effects strongly depends on the extent of chiral distortion of the π-electron system within the fullerene cage.
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Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles