Myristyltrimethylammonium bromide

Palladium metallic clusters have been prepared at room temperature by sonochemical reduction of Pd(OAc)2 and a surfactant, myristyltrimethylammonium bromide, in THE or MeOH [160[. It is noteworthy that nanosized amorphous Pd is obtained in THE, but in a crystalline form in MeOH. In this solvent, and in higher homologous alcohols, sonolysis of tetrachloropalladate(II) leads to Pd nanoclusters in which carbon atoms, formed by complete decomposition of the solvent, can diffuse. This results in an interstitial solid having the formula PdQ (0 < x < 0.15) [161]. Noble metal nanoparticles of Au, Pd, and Ag are obtained by sonicating aqueous solutions of the corresponding salts in the presence of a surfactant, which largely stabilise the naked col-... 

C, MoS-L-14C, MoS-L-12C respectively) with cetyltrimethylammonium bromide (C H42NBr), myristyltrimethylammonium bromide (C17H3,NBr) and dodecyltrimethylammonium bromide (C 5H34NBr) as the templates (designated QH NBr in general). 

C17H38BrN myristyltrimethylammonium bromide 1119-97-7 25.00 0.9966 2 30597 C18H160Sn triphenyltin hydroxide 76-87-9 20.00 1 A oAQ6 31... 

Synonyms myristyltrimethylammonium bromide tetradecyl-trimethylammonium bromide N,N,N-trimethyl-l-tetra-decanaminium bromide. 

Phthalate, myristyltrimethylammonium bromide type EOF modifier Chromate,... 

Intramolecular nitro-Michael cyclization to 29 is completed in THF at room temperature with 2 mol of cesium fluoride and myristyltrimethylammonium bromide as promoters. Prevailing trans,trans-isomet 29 is separated by crystallization and the nitro derivative reduced to amine 30 in 98 % yield. Treatment with MeONa in MeOH afforded lactame 31, which is reduced by LiAUTi to known pyrrolidine derivative 2. Direct conversion of 2 to P-lycorane by Pictet-Spengler type cyclization using paraformaldehyde and mineral acid failed. Synthesis was accomplished in high yield by a detour, methoxycarbonylation to 32, cyclization to 33 and final LiAllTj-reduction of six-membered lactame to ( )- lycorane TM 9.5. 

Synthesis of MCM-41 with Additives. The hydrothermal crystallization procedure as described earlier [10] was modified by adding additional salts like tetraalkylammonium (TAA+) bromide or alkali bromides to the synthesis gel [11]. Sodium silicate solution ( 14% NaOH, 27% Si02) was used as the silicon source. Cetyltrimethylammonium (CTA) bromide was used as the surfactant (Cl6). Other surfactants like octadecylltrimethylammonium (ODA) bromide (C,8), myristyltrimethylammonium (MTA) bromide (C,4) were also used to get MCM-41 structures with different pore diameter. Different tetralkylammonium or alkali halide salts were dissolved in little water and added to the gel before addition of the silica source. The final gel mixture was stirred for 2 h at room temperature and then transferred into polypropylene bottles and statically heated at 100°C for 4 days under autogeneous pressure. The final solid material obtained was washed with plenty of water, dried and calcined (heating rate l°C/min) at 560°C for 6 h. 

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