Density functional theory method was employed to study the effect of the nitroamino group as a substituent in cyclopentane and cyclohexane, which usually construct polycyclic or caged nitramines. Based on the optimized molecular structures of two groups of monocyclic nitramines at the B3LYP/6-31G...
Although cyclopentane itself doesn’t have a single highly favoured conformation, a substituent on the cyclopentane ring can upset the balance of strains thereby favouring either the envelope or the half-chair. In monosubstituted cyclopentanes such as methylcyclopentane, the envelope conformation is prefe...
M Blagoev,A Linden,H Heimgartner 摘要: Non-enolizable thioketones and 1,2-epoxycycloalkanes undergo a Lewis acid catalyzed addition reaction to give 1,3-oxathiolanes. Appropriate reaction conditions are CH2Cl2 as the solvent, BF3Et2O as the Lewis acid, and a temperature between 78° and r.t...
3 This paper presents further information on the substituent effects of the phenyl group, discussing the anionic ring-opening polymeriza- tion of 1. In addition, a higher ordered silylcuprate is introduced as a new initiator. Before mentioning the results, we have to refer to the related ...
The enhancement effect can be different for various organosilicon compounds since such substituent determine geometry of the ring as well as conformational stability of the compounds. There are a number of studies performed on determination of geometry and conformational stability of substituted cyclopentane...
As a follow-up to our investigation into the influence of H-bond on the C–NO2 trigger bond, a comparison of the effect of the H-bond on the ring strain energy with the C–NO2 bond dissociation energy was carried out in the HF complex with nitrocyclopropane, nitrocyclobutane, nitrocycl...
a phenyl group, or a nitro group; and m is an integer of 0 to 5; provided when m is 2 or larger, Xs may be either the same or different. The compounds are useful themselves as an effective ingredient of antifungal compositions, and can be used for intermediates of agriculture chemicals...
(57)< Abstract > This invention regards using the derivative of the F die prostagladin as the eye pressure depressant. Following to this invention, as for the chemical compound which you use, formula I: < Conversion 1 > [In formula, hatching the belt which is done means the fact that ...
substituent of 1 to 4 carbon atoms on carbon atom 2, 3 or 4, provided that when R1 is a methoxycarbonyl radical, and either R2 is an acetoxy radical and R3 is a tetrahydropyran-2-yloxy radical, or R2 is a 4-phenylbenzoyloxy radical and R3 is an acetoxy radical, A is a cis-...
(57)< Abstract > As for this invention, cyclopentane heptane acid, 2- hetero aryl alkyl or the arukeniru derivative which can possess hydroxy, the alkyl oxy, amino and the amide substituent in 1 rank, for example, 1-OH cyclopentane heptane acid, it regards the 2- heteroariruarukeniru ...