were active, but their activities were lower than that of cyproheptadine. Structure-activityrelationships were studied by Mulliken net charges, molecular electrostatic potentials, and conformational analysis; activities are better correlated with electrostatic potentials than with net charges. The decrease in potency of the open cyproheptadine analogues may be due to "dilution" of the active conformer
AbstractDensely functionalized polyether macrocycles can be prepared in one pot in yields up to 60% by the rhodium(II)‐catalyzed decomposition of methyl diazoacetoacetate in the presence of a variety of substituted or unsaturated 5‐ and 6‐membered ring cyclic ethers. A comprehensive analysis of the solid state conformations of the macrocyclic geometries is detailed as well as novel mechanistic insights about the multi‐component condensation reaction.magnified image
Prelog et al., Collection of Czechoslovak Chemical Communications, 1938, vol. 10, p. 399,409
作者:Prelog et al.
DOI:——
日期:——
Selectfluor-promoted fluorination of piperidinyl olefins
作者:Meng-Yang Chang、Nien-Chia Lee、Ming-Fang Lee、Yu-Ping Huang、Chung-Han Lin
DOI:10.1016/j.tetlet.2010.08.090
日期:2010.11
4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate (Selectfluor) is reported. Two transformations from endo-olefin 1 to allylic fluoride 3 and from exo-olefin 2 to fluorohydrin 6 proceed via allylic fluorination and fluorohydroxylation in moderate yields. It presents two novel reactions promoted by Selectfluor and broadens the scope of application.