Coupling selection

Bloch, Heinz P., Less Costly Turboequipment Uprates Through Optimized Coupling Selection, Proceedings of the 4th Annual Turbomachinery Sym posium, Texas A M University, College. Station, TX, 1975, pp. 149- i. 52... 

Coupling selection is highly dependent on the mode of operation, which includes torsional characteristics, speed, and the operating envelope. 

Most faults are attributed to poorly machined surfaces causing out-of-specification tolerances, although defective material failures also occur. Inadequate material hardness and poor strength factors contribute to many premature failures. Other common causes are improper coupling selection, improper installation, and/or excessive misalignment. 

Faas, Robert J. The divine couple selections from the mystical-alchemical treatises of Jacob Boehme and disciples. St Paul (MN) Grailstone P, 2001. 416p. 

Boehme, Jacob. The divine couple selections from the mystical-alchemical treatises of Jacob Boehme and disciples a Christian book of the mystery of eros-love meditations on the origin, fall, and restoration of humanity s original-being. St Paul (MN) Grail stone P, 2001. ISBN 0-9650488-9-6... 

Wess, J. (1998) Molecular basis of receptor/G protein-coupling selectivity. Pharmacol. Then 80, 231-264. 

For unsymmetrical zirconacyclopentadienes, Cp2ZrEt2, which we developed as an equivalent to the zirconocene—ethene complex (3), is a very useful reagent [13]. Two different alkynes couple selectively via zirconacyclopentenes (4) (Eq. 2.3). 

Nickel AML, Seker E, Ziemer BP, Ellis AB. Imprinted poly (acrylic acid) films on cadmium selenide. A composite sensor structure that couples selective amine binding with semiconductor substrate photoluminescence. Chem Mater 2001 13 1391-1397. 

Glycoproteins, such as horseradish peroxidase, are coupled selectively to other proteins or NH2-groups bearing molecules via oligosaccharide side chain oxidation. The vicinal OH groups of oligosaccharide residues are oxidized by periodate to aldehyde groups, which react with amines to form imines (Schiff bases). 

With the bisoxazoline hgand (S)-Phbox and CuCl, the asymmetric oxidative couphng of 2-naphthol and hydroxy-2-naphthoates resulted in an asymmetrically substituted 2,2 -binaphthol with ee s of up to 65% [260]. On the basis of the previous results obtained with this catalyst system, the asymmetric oxidative cross-coupling polymerization of 2,3-dihydroxynaphthalene [261] and methyl 6,6 -dihydroxy-2,2 -binaphthalene-7,7 -dicarboxylate [262] as well as the copolymerization of 6,6 -dihydroxy-2,2 -binaphthalene and dihexyl 6,6 -dihydroxy-2,2 -binaphthalene-7,7 -dicarboxylate with Cu diamine catalysts were carried out imder aerobic conditions, using O2 as the oxidant, and a cross-coupling selectivity of 99% was achieved [263]. 

Yabuki, Y., Muramatsu, T., Hirokawa, T., Mukai, H. and Suwa, M. (2005) GRIFFIN a system for predicting GPCR-G-protein coupling selectivity using support vector machines... 

Table 8.2 shows the results of the cross-coupling reaction between two differently substituted 2-naphthol derivatives using the CuCl-(5)Phbox catalyst. In conclusion, the first catalytic asymmetric oxidative coupling with a high cross-coupling selectivity was accomplished under mild conditions. 

Kostenis, E., Gomeza, J., Lerche, C., and Wess, J. (1997b). Genetic analysis of receptor-Gaq coupling selectivity. / Biol. Chem. 272, 23675-23681. 

Wess, J. (1997). G-protein-coupled receptors Molecular mechanisms involved in receptor activation and selectivity of G-protein recognition. FASEB J. 11, 346-354. Wess, J. (1998). Molecular basis of receptor/G-protein-coupling selectivity. Pharmacol. 

Burstein, E. S., Spalding, T. A., and Brann, M. R. (1996). Constitutive activation of chimeric m2/m5 muscarinic receptors and delineation of G-protein coupling selectivity domains. Biochem. Pharmacol. 51, 539-544. 

Coupling of vinyl bromides with alhynesThe P-bromide of ethyl (Z)-2,3-dibromopropenoate (1) couples selectively with trimethylsilylacetylene in the presence of Cul, Pd(0), and a base to provide the bromoenyne 2 in 86-90% yield. 

C-H activation can be used to generate carbazoles from N-aryl anilines by palladium catalyzed oxidative coupling (Scheme 3) [12]. Although this is a powerful method, it is ultimately limited by the fact that more heavily substituted N-aryl anilines may not couple selectively, leading to the formation of more than one product. 

Chloro-4-iodo furans 59 can be valuable building blocks for the synthesis of highly substituted furans as illustrated by the Suzuki coupling of chloro iodo furan 59g with boronic acid 60d (R = p-MeOCeHU) furnishing trisubstituted chloro furan 62 in 59% yield (Scheme 36). Expectedly, the coupling selectively occurs at the carbon-iodine bond. 

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