热心
发表于 2025-3-23 10:11:55
Diastereoselectivity in Organic Reactions,the facial selectivities of a number of substrates, including the better .-selectivity of .,.-2,3-diethyl-7-norbornanone in comparison to that of .,.-2,3-dimethyl-7-norbornanone, have been convincingly explained.
去掉
发表于 2025-3-23 14:51:31
Veejendra K. YadavExplains steric and stereoelectronic effects which control reactions.Offers clear visual effects for easy understanding of the stereochemical relationships.Provides lucid explanations to retain clarit
同步信息
发表于 2025-3-23 19:32:32
A(1,2) and A(1,3) Strains, facial selectivity of reactions such as and sigmatropic shifts, intramolecular S.2 reactions, hydroboration, enolate alkylation, etc. is highlighted. The high diastereoselectivity observed in the reactions of enolates derived from 4-substituted .-alkanoyl-1,3-oxazolidinones (Evans enolates) with electrophiles is discussed.
兽皮
发表于 2025-3-24 01:52:09
,The Conservation of Orbital Symmetry (Woodward–Hoffmann Rules), the symmetry characteristics of the σ, ., π and . molecular orbitals (MOs). This is followed by a description of the MOs and their symmetry characteristics for allyl cation, allyl radical, allyl anion, and 1,3-butadiene. This concept is applied to π. + π., π. + π. (Diels–Alder) and electrocyclic reactions.
Pillory
发表于 2025-3-24 04:15:35
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Grating
发表于 2025-3-24 07:22:07
Miscellaneous,eriselectivity in pericyclic reactions, torquoselectivity in conrotatory-ring openings, ambident nucleophiles and electrophiles, α-effect in nucleophilicity, carbene addition to 1,3-dienes, Hammett’s substituent constants, Hammond postulate, Curtin–Hammett principle, and diastereotopic, homotopic, and enantiotopic substituents.
dura-mater
发表于 2025-3-24 11:26:52
978-981-10-9339-5Springer Science+Business Media Singapore 2016
insolence
发表于 2025-3-24 17:14:03
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Harbor
发表于 2025-3-24 20:44:49
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GEST
发表于 2025-3-25 00:58:45
ic purposes. The risks associated with radiation exposure and handling led to the parallel development of the field of radiation protection..Pioneering experiments done by Sanche and co-workers in 2000 showed that low-energy secondary electrons, which are abundantly generated along radiation tracks,