Other Selected Examples

Tenney, Boykin and Lutz labeled carbon 1 with either C or deuterium and showed that a hydrogen or phenyl migration was not involved in the rearrangement  

They also labeled one of the C-4 phenyl groups with and found that there was no migration of this group. 

Another example of acyclic enone photorearrangements has been provided by Dauben and co-workers  

They argue that this and related enone photorearrangements do not take place via an a-cleavage (8.67), inasmuch as bonding to the central carbon atom of the allylic radical (47) or the rearrangement of an allyl radical to a cyclopropyl radical is the least favorable path available to the radical species  

Closure of the radical species (47) should form the starting materials or compound (48)  

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Other selected examples include tris(tetramethylethylene diamine-sodium)-9,9-dianthryl 143,154 alkali metal salts of 9,10-bis(diisopropylsilyl)anthracene 144,155 as well as the closely related naked 9,10-bis(trimethylsilyl)anthra-cene radical anion 145.156 This chemistry is further extended to the solvent-shared and solvent-separated alkali metal salts of perylene radical anions and dianions 146, 147,156 while other examples focus on alkali metal salts of 1,2-diphenylbenzene and tetraphenylethylene derivatives, where reduction with potassium in diglyme afforded contact molecules with extensive 7r-bonding, [l,2-Ph2C6H4K(diglyme)] 148.157 Extensive 7r-coordination is also observed in (1,1,4,4 tetraphenylbutadiene-2,3-diyl)tetracesiumbis(diglyme)bis(methoxyethanolate) 149.158... 

Other selected examples are also listed in Table 5.2 [14]. Several characteristic features of the present alkylations include ... 

The importance of these structures is clear by observing the numerous biomedical applications7711 that have been suggested for such compounds including inhibition of viral and bacterial infections, tumor eradication by stimulating the immune response, preventing toxin binding, and many others. Selected examples have been chosen to illustrate these potentialities. 

Various other selected examples of bioassays for some other pathogen-plant interactions are presented in Table 16.3. Detached leaf segments have been widely used to evaluate pathogenicity, host resistance genetics, and sensitivity to... 

Another feature of the post-licensing period is the increase in published university research and publications from mechanical and chemical engineering companies. This includes H. Herrmann s standard work of 1972, referred to [36] in Section 2.4.1 along with other selected examples [42, 43],... 

Two other selected examples of the application of INADEQUATE to fullerenes focus on endohedral metallofullerenes. The first is based on the reported mapping of the bond connectivity in the carbon cage of La C82 anion, [La C82A]+75 The 13C NMR spectrum of [La C82A] showed 17 distinct lines of near-equal intensity and 7 lines of half the intensity. This is expected (17x4 + 2x7 = 82) for a molecule with a C2l. symmetry. 

Other selected examples of this "classicar fluorination method arc summarized in Table 10. 

Other selected examples are summarized in Table 2. In addition to aldehydes, both cyclic and acyclic ketones can be reduced equally well. sec-Phenethyl alcohol (11, R = Ph) as hydride source works more effectively than t-PrOH. On the basis of this finding, the asymmetric MPV reduction of unsymmetrical ketones with chiral alcohol in the presence of catalyst 10 was examined [30]. Treatment of 2-chloroacetophenone (12) with optically pure (R)-(+)-sec-phenethyl alcohol (1 equiv.) under the influence of catalytic 10 at 0 °C for 10 h afforded (5)-(+)-2-chloro-l-phenylethanol (13) with moderate asymmetric induction (82 %, 54 % enantiomeric excess, ee Sch. 8). Switch-... 

Other Selected Examples of Heteropairs Without Orbital Degeneracy. 323... 

For other selected examples of Ugi-type reactions staring from 1, n-diamines see (a) Shaabani, A. Maleki, A. Moghimi-Rad, J. (2007) Journal of Organic Chemistry, 72, 6309-6311. (b) Krasavin, M. Parchinsky, V. (2008) Synlett, 645-648 (c) Kysil, V. Tkachenko, S. Khvat, A. Williams, C. Tsirulnikov, S. Churakova, M. Ivachtchenko, A. (2007) Tetrahedron Letters, 48, 6239-6244. 

Aminoplast (MF) has been used to prepare microcapsules of hquid pesticides, namely methyl parathion [71] and metachlor [72]. Other selected examples of microcapsules containing agrochemicals such as pesticides, herbicides, fertihzers and insecticides have been reported and are summarized in Table 5.10. 

Below, a few other selected examples of medicinally important classes of natural chiral compounds are given. 

Other Selected Examples of Boundary Value Problems... 

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