01795nas a2200277   4500008004100000022001400041245011700055210006900172260006900241300001400310490000800324520078600332653002101118653001401139653001501153653003001168653004301198653002201241100002001263700001901283700002601302700002301328700002601351700001501377856012501392       2005                        eng d  a0022-328X00aSynthesis, structure, electrochemistry and ROMP-activity of new ferrocenyl analog of Grubbs' metathesis catalyst0 aSynthesis structure electrochemistry and ROMPactivity of new fer  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcFEB  a1018-10270 v6903 a<p>Treatment of [(PCy3)(2)Cl2Ru=CH-Ph] (1) with vinylferrocene 1 and 1-ferrocenyl-1,3-butadiene 2 yielded solid products. These new complexes were characterized by H-1 NMR, P-31 NMR and C-13 NMR spectroscopy. X-ray crystal structures of both the complexes have been solved. The crystal structure of II confirmed the assigned structure and revealed existence of two sets of intermolecular C-H-Cl(M) type interactions, viz. (Ru)Cl-H-C(ferrocene) and (Ru)Cl-H-CHCl2. The air-stable, dark solid II is all efficient catalyst for ring-opening metathesis polymerization (ROMP) of cyclopentene, norbornene and cycloocta-1,5-diene. Electrochemical behavior of the complexes clearly reflects electronic communication between two metal centers. (C) 2004 Elsevier B.V. All rights reserved.</p>10aElectrochemistry10aferrocene10aMetathesis10anon-covalent interactions10aring-opening metathesis polymerization10aruthenium carbene1 aMaishal, T., K.1 aMondal, Biplab1 aPuranik, Vedavati, G.1 aWadgaonkar, P., P.1 aLahiri, Goutam, Kumar1 aSarkar, A.  uhttps://library.ncl.res.in/content/synthesis-structure-electrochemistry-and-romp-activity-new-ferrocenyl-analog-grubbs-101360nas a2200229   4500008004100000022001400041245011700055210006900172260007700241300001400318520049600332653001500828653001500843653001900858653001500877653002000892100001900912700002500931700002500956700002600981856012301007       2011                        eng d  a1434-193X00aEnantioselective total syntheses of (-)-isonitramine, (-)-sibirine, and (+)-nitramine by ring-closing metathesis0 aEnantioselective total syntheses of isonitramine sibirine and ni  aPO BOX 10 11 61, D-69451 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcDEC  a7372-73773 a<p>Concise enantioselective total syntheses of naturally occurring 2-azaspiro[5,5]undecan-7-ol (Nitraria) alkaloids viz. ()-isonitramine, ()-sibirine, and (+)-nitramine are accomplished in 42, 38, and 25?% overall yield, respectively, in six steps starting from enantiomerically pure (S)-methyl 3-allyl-2-oxo-1,2,3,6-tetrahydropyridine-3-carboxylate (&gt;99?%?ee). The key feature of the syntheses involves diastereoselective HosomiSakurai allylation followed by ring-closing metathesis.</p>10aAlk-aloids10aAllylation10aAmino alcohols10aMetathesis10aTotal synthesis1 aPandey, Ganesh1 aKumara, Prasanna, C.1 aBurugu, Shiva, Kumar1 aPuranik, Vedavati, G.  uhttps://library.ncl.res.in/content/enantioselective-total-syntheses-isonitramine-sibirine-and-nitramine-ring-closing-0