Functionalization of saturated hydrocarbons. High temperature bromination of octahydropentalene. Part 19
作者:Duygu D. Günbaş、Fatih Algı、Tuncer Hökelek、William H. Watson、Metin Balci
DOI:10.1016/j.tet.2005.09.019
日期:2005.11
The synthesis and thermal bromination of octahydropentalene was studied. The reaction afforded 1a,3a,4b,6b-tetrabromo-1,2,3,4,5,6-hexahydropentalene (14) with remarkable regio- and stereospecificity. The structure of the product was determined by 1H and 13C NMR data and single X-ray structural analysis. The treatment of octahydropentalene with tenfold bromine gave the octabromopentalene derivative
研究了八氢戊烯的合成和热溴化反应。反应得到具有显着的区域和立体特异性的1a,3a,4b,6b-四溴-1,2,3,4,5,6-六氢戊烯(14)。产物的结构通过1 H和13 C NMR数据以及单X射线结构分析确定。用十倍溴处理八氢戊烯得到八溴戊二烯衍生物。讨论了产品的形成机理。
Vinyl Carbocations Generated under Basic Conditions and Their Intramolecular C–H Insertion Reactions
作者:Benjamin Wigman、Stasik Popov、Alex L. Bagdasarian、Brian Shao、Tyler R. Benton、Chloé G. Williams、Steven P. Fisher、Vincent Lavallo、K. N. Houk、Hosea M. Nelson
DOI:10.1021/jacs.9b02110
日期:2019.6.12
Here we report the surprising discovery that high-energy vinyl carbocations can be generated under strongly basicconditions, and that they engage in intramolecular sp3 C-H insertion reactions through the catalysis of weakly coordinating anion salts. This approach relies on the unconventional combination of lithium hexamethyldisilazide base and the commercially available catalyst, triphenylmethylium
Nickel Hydride Complexes Supported by a Pyrrole-Derived Phosphine Ligand
作者:Joel D. Collett、Jeanette A. Krause、Hairong Guan
DOI:10.1021/acs.organomet.1c00694
日期:2022.2.14
The synthesis of two nickel hydride complexes bearing the pyrrole-derived phosphine ligand CyPNH (2-(dicyclohexylphosphino)methyl-1H-pyrrole) was developed, namely, (κP-CyPNH)(κP,κN-CyPN)NiH and the acid-stable trans-(κP-CyPNH)2Ni(OAc)H·HOAc. (κP-CyPNH)(κP,κN-CyPN)NiH stoichiometrically reduces benzaldehyde and acetophenone in a metal–ligand cooperative manner and catalytically dimerizes ethylene and
开发了吡咯衍生膦配体Cy PN H (2-(dicyclohexylphosphino)methyl-1 H -pyrrole) 的两种氢化镍配合物的合成,即(κ P - Cy PN H )(κ P ,κ N - Cy PN)NiH 和酸稳定的反式-(κ P - Cy PN H ) 2 Ni(OAc)H·HOAc。(κ P - Cy PN H )(κ P ,κ N - CyPN)NiH 化学计量以金属配体协同的方式还原苯甲醛和苯乙酮,并催化乙烯二聚化和环异构化 1,5-环辛二烯和 1,5-己二烯。trans -(κ P - Cy PN H ) 2 Ni(OAc)H·HOAc,可从 (κ P - Cy PN H )(κ P ,κ N - Cy PN)NiH 用乙酸质子化得到,催化环化异构化1,5-环辛二烯的合成更有效,并产生热力学上不太有利的 1,5-环辛二烯的环状异构体。
Studies on the pauson-khand reaction. Exclusive formation of angularly fused triquinanes from bicyclo[3.3.0]oct-2-ene and propargyl derivatives
作者:Angel-Manuel Montaña、Albert Moyano、Miquel A. Pericas、Felix Serratosa
DOI:10.1016/s0040-4020(01)91440-1
日期:1985.1
Reaction of bicyclo[3.3.0]oct-2-ene with different hexacarbonyl dicobalt complexes of propargyl derivatives leads, under a great variety of experimental conditions, to the exclusive formation of angularly fused triquinanes, the corresponding reduced products being formed if the reaction is run at high temperature. The intermediacy of a π-allyl complex is suggested in order to account for these results
Production of elastomeric functionalized olefin polymers
申请人:Baugh Lisa Saunders
公开号:US20090062475A1
公开(公告)日:2009-03-05
In a process for producing a functionalized polyalkenamer, at least one monomer comprising a monocyclic olefin having at least one pendant alkyl group bonded thereto, wherein the pendant alkyl group has at least two carbon atoms and is substituted with a polar moiety spaced by at least one carbon atom from the monocyclic olefin, is contacted with a polymerization catalyst under conditions effective to effect ring opening polymerization of the monocyclic olefin and produce the functionalized polyalkenamer.