Polycyclic strain

Finally, in polycyclic strained derivatives of the cage type, the semibenzilic mechanism will be preferred because of the equatorial halogen and the fairly high ring strain, which actually prohibits cyclopropanone formation. In most of... 

On the other hand, 2,6-diazasemibullvalene (NSBV) features an aziridine ring and unique polycyclic strained skeleton, which is expected to show unique properties and reactions toward the synthesis of A-heterocycles. NSBV is also... 

Alicyclic dianhydrides are interesting for electronic applications. The polyimides obtained from them are colorless with high transparency in the visible range, exhibit low birefringence,125 and have a low dielectric constant.126 The reactivity of the polycyclic aliphatic dianhydride has been investigated. For example, bicyclo-[2,2,2]-oct-7-ene tetracarboxylic dianhydride reacts quickly with an aromatic amine because the bicyclo-imide is less strained than the corresponding dianhydride.127... 

Geiselbrecht AD, BP Hedland, MA Tichi, IT Staley (1998) Isolation of marine polycyclic aromatic hydrocarbon (PAH)-degrading Cycloclasticus strains from the Gulf of Mexico and comparison of their PAH degradation ability with that of Puget Sound Cycloclasticus strains. Appl Environ Microbiol 64 4703-4710. 

Kasai Y, K Shindo, S Harayama, N Misawa (2003) Molecular characterization and substrate preference of a polycyclic aromatic hydrocarbon dioxygenase from Cycloclasticus sp. strain A5. Appl Environ Microbiol 69 6688-6697. 

Deziel E, G Paquette, R Villemur, F Lepine, J-G Bisaillon (1996) Biosurfactant production by a soil Pseudomonas strain growing on polycyclic aromatic hydrocarbons. Appl Environ Microbiol 62 1908-1912. 

Demanhche S, C Meyer, J Micoud, M Louwagie, JC Wilson, Y Jouanneau (2004) Identification and functional analysis of two ring-hydroxylating dioxygenases from a Sphingomonas strain that degrades various polycyclic aromatic hydrocarbons. Appl Environ Microbiol 70 6714-6725. 

Vila J, Z Lopez, J Sabate, C Minguillon, AM Solanasm, M Grifoll (2001) Identification of a novel metabolite in the degradation of pyrene by Mycobacterium sp. strain API actions of the isolate on two- and three-ring polycyclic aromatic hydrocarbons. Appl Environ Microbiol 67 5497-5505. 

Andersson BE, T Henrysson (1996) Accumulation and degradation of dead-end metabolites during treratment of soil contaminated with polycyclic aromatic hydrocarbons with five strains of white-rot fungi. Appl Microbiol Biotechnol 46 647-652. 

Arino S, R Marchal, J-P Vandecasteele (1998) Involvement of a rhamnolipid-producing strain of Pseudomonas aeruginosa in the degradation of polycyclic aromatic hydrocarbons by a bacterial community. J Appl Microbiol 84 769-776. 

Tandem transesterification and diastereoselective intramolecular 1,3-dipolar cycloaddition of a-methoxycarbonylnitrones with chiral allyl alcohols give polycyclic compounds in one step with high stereoselectivity (Scheme 8.14).76 Transition state Ain Scheme 8.14 is more favorable than B because B has severe steric interaction (allylic 1,3-strain).77... 

Figure 4. Calculation of the substrate uptake driven diffusive transfer of the polycyclic aromatic hydrocarbon anthracene to Mycobacterium sp. LB501T (solid line) and three other imaginary bacterial strains differing from strain LB501T by their 100-fold lower (dots), 10-fold lower (long dashes) and 10-fold higher (short dashes) specific affinities,...

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