7694-77-1Relevant articles and documents
Production of renewable lubricants: Via self-condensation of methyl ketones
Balakrishnan, Madhesan,Arab, George E.,Kunbargi, Omar B.,Gokhale, Amit A.,Grippo, Adam M.,Toste, F. Dean,Bell, Alexis T.
, p. 3577 - 3581 (2016)
Self-condensation of biomass-derived methyl ketones catalyzed by solid bases or acids produces corresponding cyclic trimers exclusively in excellent yields. Condensates containing 24-45 carbon atoms are shown to be suitable lubricant base-oils after the removal of residual unsaturation and oxygen. Properties of cycloalkanes produced from biomass are very similar to those of conventional lubricant base-oils. The process reported here offers an environmentally benign alternative to the current non-selective production of lubricant base-oils from α-olefins, and avoids the production of corrosive waste products.
Synthesis, characterization and catalytic application of some novel PNP-Ni(II) complexes: Regio-selective [2+2+2] cycloaddition reaction of alkyne
Tamizmani, Masilamani,Sivasankar, Chinnappan
, p. 82 - 89 (2017/07/22)
Some novel Ni(II) complexes of PN(H)PPh, PN(Me)PiPr and PN(Me)PtBu ligands have been synthesized and characterized using standard analytical and spectroscopic methods such as 1H NMR, 31P NMR, elemental analysis, ESI-MS, UV-Visible spectroscopy and single-crystal X-ray crystallography. In the presence of silver triflate, complex [PN(H)PPhNiBr]2NiBr4 (5) activated the C?Cl bond of dichloromethane at room temperature and afford complex [PN(H)PPhNiCl]OTf (6). We have also performed alkyne [2+2+2] cycloaddition reaction using Ni(II) complexes and observed high regioselectivity of the products. The observed selectivity is well correlating with the electronic feature of alkynes. The [2+2+2] cycloaddition of electron rich alkynes produced 1,3,5-substituted benzene derivatives as a major product whereas the electron deficient alkynes produced 1,2,4-substituted benzene derivatives as a major product.
Short synthesis of methylenecyclopentenones by intermolecular Pauson-Khand reaction of allyl thiourea
Petrovski, ?eljko,Martins, Bruno M.R.,Afonso, Carlos A.M.
supporting information; experimental part, p. 3356 - 3359 (2010/08/19)
N,N,N′-Trimethylallylthiourea promotes the intermolecular Pauson-Khand reaction with alkynes in the presence of Co2(CO)8 and moderate pressure of CO followed by thiourea elimination allowing the formation of methylenecyclopentenone d