109283-59-2Relevant academic research and scientific papers
A novel and highly efficient method for the silylation of alcohols with hexamethyldisilazane (HMDS) catalyzed by recyclable sulfonic acid-functionalized ordered nanoporous silica
Zareyee, Daryoush,Karimi, Babak
, p. 1277 - 1280 (2007)
Silylation of alcohols with hexamethyldisilazane (HMDS) in dichloromethane provides the corresponding silyl ethers in almost quantitative yields at room temperature using 1-3 mol % of sulfonic acid-functionalized silica. Additionally, the catalyst display
KF/clinoptilolite NPs: An efficient and heterogeneous catalyst for chemoselective silylation of alcohols and phenols
Oladee, Razieh,Zareyee, Daryoush,Khalilzadeh, Mohammad A.
, p. 731 - 737 (2021/03/31)
Potassium fluoride incorporated on clinoptilolite nanoparticles (KF/CP NPs) by ion exchanging is found to be an effective and inexpensive heterogeneous nanocatalyst for chemoselective silylation of alcohols and phenols with 1,1,1,3,3,3-hexamethyldisilazane (HMDS) at room temperature. Nano-powder of clinoptilolite (CP) was prepared using a planetary ball mill mechanically method and characterized by dynamic light scattering (DLS), X-ray powder diffraction (XRD) and scanning electron microscope (SEM) analyses. Almost all of products were obtained in high yields as well as short reaction times and the catalyst was also reused eight times without loss of its catalytic activity.
Highly efficient and chemoselective trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) catalyzed by reusable electron-deficient [TiIV(salophen)(OTf)2]
Yadegari, Maryam,Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah,Mohammadpoor-Baltork, Iraj
experimental part, p. 332 - 338 (2012/03/12)
In the present work, highly efficient trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) catalyzed by high-valent [Ti IV(salophen)(OTf)2] is reported. Under these conditions, primary, secondary and tertiary alcohols as well as phenols were silylated in short reaction times and high yields. It is noteworthy that this method can be used for chemoselective silylation of primary alcohols in the presence of secondary and tertiary alcohols and phenols. The catalyst was reused several times without loss of its catalytic activity.
New method for the synthesis of 2-aza-1,3-butadienes
Sisak, Attila
, p. 3693 - 3702 (2007/10/03)
2-Aza-1,3-butadienes have been synthesized from carbonyl compounds and 1,1,1,3,3,3-hexamethyl-disilazane in the presence of cobalt-containing catalysts. The best yields (up to 95%) were achieved in the case of aldehydes branched in the α-position and 2-methylcyclohexanone. In the case of two α,β-unsaturated ketones, pyridine derivatives were found as the main products. Copyright Taylor & Francis Group, LLC.
R3Al-R′3SiOTf: Novel and powerful reagent system for stereospecific alkylation-silylation reactions of epoxides
Shanmugam, Ponnusamy,Miyashita, Masaaki
, p. 3265 - 3268 (2007/10/03)
(Matrix presented) A novel and powerful reagent system R 3Al-R′3SiOTf for the one-pot alkylation-silylation reaction of epoxides was discovered, and the reactions of various epoxides with the new reagent system have been demonstrated to occur stereospecifically giving rise to the corresponding alkylation-silylation products in excellent yields.
On the So-called 'Surprising Observation Concerning Sodium Hydride Based Complex Reducing Agents'
Caubere, Paul,Vanderesse, Regis,Fort, Yves
, p. 742 - 745 (2007/10/02)
Nordahl and Carlson in their published article questioned results obtained by us involving ZnCRASi .In the present publication it is shown that, in fact, their assertions are wrong.Moreover, it is shown that the main factors governing CRAs cannot be determined by the multivariate method used by Nordahl and Carlson.Finally, the reductions performed with the reagent proposed by Nordahl and Carlson are shown to be stronglydependent on the experimental procedure, contrary to their assertion, and less selective than those performed with CRAs.
