Reference Report

Interestingly, we were intrigued by the ESI mass spectrum of the compound, as the observed base peak consisted of [M-S02+Na]+. This led us to explore a thermal retro-Diels-Alder reaction that could afford the desired enone 69. It is noteworthy that the chemistry of cyclic enol-sulfites would appear to be an under-explored area with a few references reporting their isolation being found [57]. At last, we were also able to prepare epoxy ketone 70 from 69 in three steps, albeit epoxidation did not take place unless the TES group was removed. Spartan models reaffirmed our initial conformational assessment of enone 69 and epoxy ketone 70, which contain sp3-hybridized C8a and s/r-hybridized C8b (p s e u d o-. v/r - h y b r i d i zed C8b for 70) at the AB-ring junction (Fig. 8.12) and displayed the desired twisted-boat conformation in A-ring. 

The addition of carbon nanotubes that were either reactively milled under hydrogen mixed with Mg powder [142] or simply mixed with MgH and subsequently milled [143, 144] was investigated. In vacuum, desorption at 200°C gave 3.6 wt.% within 1,800 s [142]. Another reference reports 5 wt.%Hj desorbed at 300°C within... 

The reference reports uncertainty over the stereochemical assignment of the product. 

This reference reports the enthalpy of sublimation as the enthalpy of vaporization. 

One reference reports that the addition of oxygen to phenylhydrazones gives a 1,2,3-dioxazetidine which is explosive. However, it could just as readily be a hydroperoxide (14CB3277). 

A Aqueous NaOH, B t-Butanol-water-potassium hydroxide. In parentheses references reporting different yields... 

In 1986, J.I. Hedges and colleagues (see reference) reported on how dissolved and particulate organic material transported by rivers can provide... 

This reference reports the appearance of a light-induced potential difference between two electrodes separated by a specially organized molecular multilayer. A barium electrode and a semitransparent aluminium electrode, which have substantially different electronic work functions JAl > c/Ba, have been used in these studies. The two electrodes were separated by a multilayer system consisting of a layer of isolating molecules covered by a... 

The amount of a triazine retained or sorbed by soil can range from 0% to 100% of the amount applied, but typically sorption on silt loam, loam, or clay loam surface soils ranges from 50% to 80% of the amount applied. Although sorption of triazines (particularly atrazine) by soils has been studied for more than 40 years, there continue to be numerous studies each year to quantify sorption by different soils and to characterize the factors that affect triazine sorption. For instance, in a review of literature for 1964-1984, Koskinen and Moorman (1985) found 343 published Kd values for sorption of atrazine on 148 soils. These published Kd values averaged 4.0 4.0. From 1985 through 1995, 35 additional references reported Kd or Kf values for atrazine alone (Table 21.6). Average reported Kd values are 2.4 7.3 for 109 surface and subsurface soils (Paya-Perez et al., 1992) and 4.9 1.9 for 117 surface soils (Jaynes et al., 1995). 

Numerous reports of other examples of 1 2 Peacock-Weakley complexes are summarized in Table 5. Whereas some of these species have subsequently been confirmed by structural crystallography, many of the cited references report only non structure-specific data such as elemental analyses, IR spectra, magnetic moments, and electrochemistry. 

Table II lists some furan and thiophene components substituted with sulfur at the three position on both heterocyclic rings generated in one reaction system. Also included are Kovats retention index data and references reporting the occurrence in foods or model systems.

Of course, these relationships do not take into account the variations in SO4 chemical shift due to the effects of counterions, pH, concentration and temperature. It has not been possible to adopt the IUPAC chemical shift scale exactly, because that would require measuring the chemical shifts of all secondary references reported in the literature with respect to the standard suggested by IUPAC. 

NR = no calibration vs. internal reference reported. All RTIL structures are given in Figure 11.7. 

R. M. Parr, Human dietary intakes of trace elements a global literature survey mainly for the period 1970-1991 data listings and references, Report IAEA-NAHRES-12, Vienna, International Atomic Energy Agency, 1992. 

The alkene pseudohalogen adducts (15) of Scheme 8 are also useful intermediates for aziridine synthesis. These adducts are discussed later in Sections 3.S.6.2-4. The iodine azide and bromine azide adducts may be reduced to aziridines with many reagents recent references report use of lidiium aluminum hydride - and dimethylamineborane. The iodine isocyanate aziridination continues to prove useful, as in Scheme Since the recent reviews, - the mechanism of the triphenylphosphine-based... 

On the other hand, some experimental results are in agreement with the predominance of path b (Fig. 24) they arc due in particular to the aptitude of a very large number of substrates to react readily with aldehydes (see references reported for 12 and Ref. 274). Indeed, several successful syntheses of Mannich bases have been carried out starting from the hydroxymethyl derivative of the substrate, as reported for C-Mannich bases obtained from ferrocenyl derivatives,- nitroalkanes. - and hydrogen cyanide as well as for N-, S-, P-Mannich bases of benzimidazoles, sulfonic acids,- phosphines, etc. 

Different references report slightly different positions for the absorption bands of [V(H20)5] and hence slightly different values of B and... 

Stampy 1.0.2 High-sensitivity mapping with indels and moderately diverged genome reference Reportedly slower than other mappers, but speed improvements if BWA used for initial alignment N http //www.well.ox.ac.uk/ project-stampy... 

Experimental results are often re-published. Re-published results are reported only once in the present review, but with as many literature references as possible. This approach is different from that adopted in [2], in which only one of many literature references reporting the same results was selected. It was not always clear if the same data were re-published. It might very well have happened that re-published results appear as separate entries on the one hand or that two independent studies are grouped as one entry on the other. Assessment of originality or of precedence was not the goal of the present study. 

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