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- W2055014551 abstract "A correlation between the solvent polarity and the logarithm of the diastereoisomer ratio (dr) was found for the uncatalyzed [4+2] cycloaddition of cyclopentadiene to N,N′-fumaroyldi[(2R)-bornane-10,2-sultam]. Using the Abboud-Abraham-Kamlet-Taft parameters, predictive values for this method, allowed an optimum diastereoisomeric excess (de) of 96% (EtOH, −78°). A similar diastereoselectivity was achieved using 5M LiClO4/Et2O or H2O/β-cyclodextrin, and the influence of supercritical CO2 is also reported. Selective cycloadditions of apolar diene in polar solvents are entropically favored by the greater dipole moment of the N-enoylcamphorsultam syn-s-cis conformers and of the C(α)-re transition states. Implications on the stereochemical course of the reaction are discussed." @default.
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- W2055014551 date "1998-12-16" @default.
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- W2055014551 title "Influence of the Solvent Polarity on the Stereoselectivity of the Uncatalyzed [4+2] Cycloaddition of Cyclopentadiene toN,N′-Fumaroyldi[(2R)-borane-10,2-sultam]" @default.
- W2055014551 cites W2253428645 @default.
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- W2055014551 doi "https://doi.org/10.1002/(sici)1522-2675(19981216)81:12<2314::aid-hlca2314>3.0.co;2-i" @default.
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