• Title/Summary/Keyword: Allyltrimethylsilane

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Mild and Efficient Tris(pentafluorophenyl)borane-catalyzed Sakurai Allylation of N-Benzyloxycarbonylamino p-Tolylsulfone with Allyltrimethylsilane

  • Thirupathi, Ponnaboina;Neupane, Lok Nath;Lee, Keun-Hyeung
    • Bulletin of the Korean Chemical Society
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    • v.33 no.4
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    • pp.1275-1278
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    • 2012
  • Tris(pentafluorophenyl)borane, $B(C_6F_5)_3$, was found to be an efficient catalyst for synthesis of N-Cbzhomoallylic amines using Sakurai allylation of N-benzyloxycarbonyl-amino p-tolylsulfones with allyltrimethylsilane.

Magnesium Bistrifluoromethanesulfonimide Catalyzed Three-component Synthesis of Protected Homoallylic Amines

  • Wang, Hongshe;Zeng, June
    • Bulletin of the Korean Chemical Society
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    • v.32 no.7
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    • pp.2203-2206
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    • 2011
  • A mild and efficient procedure has been developed for the one-pot, three-component reaction of aldehydes, benzyl carbamate and allyltrimethylsilane in the presence of 3 mol % of magnesium bistrifluoromethanesulfonimide at room temperature to afford the corresponding protected homoallylic amines in high yields.

The Effect of Thermal Stability of Cu(I) Precursors on the Deposition in the Metal Organic Chemical Vapor Deposition (MOVCD에 있어서 구리(l)전구체들의 열적 안정성이 증착에 미치는 영향)

  • Park, Man-Young;Lee, Shi-Woo
    • Korean Journal of Materials Research
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    • v.8 no.4
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    • pp.345-353
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    • 1998
  • Metal organic chemical vapor deposition (MOCVD) of copper using three Cu( I ) precursors. (hfac)Cu (VTMS) (hfac= hexafluoroacetylacetonate, VTMS= vinyltrimethylsilane), (hfac)Cu(VTMOS) (VTMOS= vinyltri¬methoxysilane) and (hfac)Cu(A TMS) (A TMS= allyltrimethylsilane) was studied. The thermal stability and the gase¬ous phase reaction mechanism of Cu( I ) precursors were identified using $^1H$-, $^I3C$-NMR and Fourier transform infra¬red spectroscopy. It was found out that thermal stability of liquid phase (hfac)Cu(VTMS) and (hfac)Cu(VTMOS) were better than that of (hfac)Cu(A TMS) using FT - NMR. From in-situ FT - IR experiments, the disproportion reaction of Cu(hfac). the decomposition reaction of Cu(hfac), and cracking of free hfac ligand were observed. Also the effect of gaseous phase reaction on the deposition rates and film properties was investigated. The minimum temperature that deposition of copper films from (hfac)Cu(A TMS) was as low as 60$^{\circ}$C and such a low deposition temperature compared with those of other Cu( I ) precursors is believed to be related with weaken Cu- A TMS bond.

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Copolymerization of 2-Hydroxyethyl Methacrylate with Functional Silane Monomers (2-히드록시에틸 메타크릴레이트와 기능성 사이레인 단량체와의 공중합에 관한 연구)

  • Sung, Yong-Kiel;Lee, Chang-Gyu;Jung, Il-Nam
    • Journal of Biomedical Engineering Research
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    • v.8 no.1
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    • pp.29-40
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    • 1987
  • 2-Hydroxyethyl methacrylate(HEMA) was copolymerized with allyltrimethylsilane- (ATMS) and allylt.imethoxysilane(ATMOS) at 70。C in N, N'dimethylformamide- (DMV) using $\alpha$ , $\alpha$'-azobisisobutyronitrile(AIBN). The compositions of unreacted monomers were determined by gas chromatographic analysis. The monomer reactivity ratios were determined by Fireman-Ross, Helen-Tiidus and intersection methods. The average values are as follows : $$r_1(HEMA) : 6.62 $\pm$ 0.07, r_2(ATMS) : 0.07 $\pm$ 0.01 for HEMA-ATMS system.$$ $$r_l(HEMA) : 4.09 $\pm$ 0.14, r_2(ATMOS) : 0.06 $\pm$ 0.01 for HEMA-ATMOS toys tem.$$ The lower rl(HEMA) In the HEMA-ATMOS system as compared to HEMA ATMS system may be contributed to higher relative reactivity of ATMOS toward the poly(HEMA) radical. The compositions of synthesized copolymers were determined from silicon con tents estimated gravimetrically. The thermal stabilities of the copolymers were investigated by thermogravimetry(TG). The enthalpic changes associated with the endothermic transition were evaluated by differential scanning calorimetry(DSC). The swelling properties of the copolymers in water were also investigated.

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