(±)‐ trans ‐2‐(Phenylsulfonyl)‐3‐phenyloxaziridine

Abstract

(±)‐ trans ‐2‐(phenylsulfonyl)‐3‐phenyloxaziridine intermediate: N‐Benzylidenebenzenesulfonamide. product: (±)‐trans‐2‐(Phenylsulfonyl)‐3‐phenyloxaziridine. product: R = Ph, Ar = 3NO2Ph product: R = Ph, Ar = 4NO2Ph product: R = Me, Ar = Ph product: R = PhCH2, Ar = Ph

Accelerating Universe From Extra Spatial Dimension

“…While these and other models have some motivation and also attractive features none of them are compelling because of the fact that the cosmological constant or an evolving quintessence energy require extremely small number to fit the data: the present value of the energy density , ρ c ∼ 10 −12 eV , and in the case of quintessence, the tiny mass smaller than the current Hubble parameter m Q < H 0 ∼ 10 −33 eV and sub-gravitational couplings to visible matter to satisfy fifth force constraints [7].In view of the fact that the observational data coming from the supernova studies probe length scales l ∼ H −1 0 ∼ 10 3 Mpc , which are so far inaccessible to any particle physics experiments , various alternative proposals [8] have cropped up time to time to account for the current accelerated expansion without assuming any form of dark energy.They include phantom energy [9], certain modification of GR [10], Chaplygin gas as also its variable form [11]. Very relevant to mention that Vishwakarma [12] in a series of works took a completely opposite view to argue that it is possible to explain the dimming of supernovae within the framework of of the conventional decelerating model itself. Another line of argument is put forward by to suggest [13] that the radiation coming from the SNe are partially absorbed due to encounter by an obstacle.…”

A Palladium‐Catalyzed Multicomponent Coupling Approach to π‐Conjugated Oligomers: Assembling Imidazole‐Based Materials from Imines and Acyl Chlorides

“…[17] As shown in Table 1, the coupling of these units in the presence of [Pd 2 dba 3 ] catalyst does indeed result in the formation of 1 a, albeit in very low yield (25 %). Examination of the reaction mixture shows a major product of the reaction is the iminium salt intermediate 6, which implies that the oxidative addition of this substrate to palladium (step b) may be slow.…”

Golgi-modifying properties of macfarlandin E and the synthesis and evaluation of its 2,7-dioxabicyclo[3.2.1]octan-3-one core

“…opposite configuration at C12 of that found in MacE (36). The α-epimer of 20 was converted to the β-epimer by equilibration, allowing the overall efficiency of the conversion of 20 to 22 to be improved to 66% (two recycles).…”