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Benzyltrimethylammonium iodide

Elimination of p-[(trimethylsilyl)methyl]benzyltrimethylammonium iodide with fluoride leads via the intermediate p-quinodimethene to [2.2]paracyclophane (7). This very versatile method can also be applied for the syntheses of [2.2](2,5)furano-and thiophenophane 48a). [Pg.35]

Essentially the same procedure may be used for the preparation of 2,3-dimethylbenzyldimethylamine from 2-methyl-benzyltrimethylammonium iodide except that the time of addition of the latter to the sodium amide is increased to 75 minutes. The checkers found it necessary also to use a larger volume of ammonia. Thus, on a 0.3-mole scale, 1 1. of ammonia was employed, and a total of 600 ml. more ammonia was added during the reaction to maintain the volume at 800 1000 nil. [Pg.63]

Show how you would use direct alkylation to synthesize the following compounds, (a) benzyltrimethylammonium iodide (b) pentan-1-amine (c) benzylamine... [Pg.900]

Ito and coworkers developed a mild and efficient procedure for generating o-quinodimethanes" as reactive intermediates in [4 -I- 2] cycloadditions. The key step in the sequence, illustrated here by the synthesis of Estrone methyl ether (146 Scheme 53) involves a fluoride-induced fragmentation of the o-[a-(trimethylsilyl)alkyl]benzyltrimethylammonium iodide (144) to give the o-quinodimethane (145), which underwent stereoselective intramolecular [4 + 2] cycloaddition to give the desired tetracyclic framework in (146). The entire process was conducted at room temperature. The annulation reaction is not limited to intramolecular cycloadditions intermolecular versions of the reaction proceed equally well. [Pg.1007]

Brasen and Hauseri describe a procedure for effecting reductive rearrangement of benzyltrimethylammonium iodide (1) to the tertiary amine (2). [Pg.1253]

Rearrangement catalyst. The reagent effects exclusive ortho rearrangement of benzyltrimethylammonium iodide to 2,N,N-trimethylbenzylamine.ub... [Pg.360]

This parallels the kinetic study conclusions(52) that the two sites are initially kinetically identical with respect to toxin binding, and yet differ in reactivity toward the affinity alkylating agent, 4-(N-maleimido)-benzyltrimethylammonium iodide. The 2 1 stoichiometry and structural similarity of the toxin combining sites of AChR have been recently confirmed also by EPR studies of interaction of nonselectively spin labeled Naja naja siamensis long-type a-neuro toxin with Torpedo californica AChR solubilized protein and AChR-rich membranes(53). [Pg.244]

Present in the solution are [ H]MBTA and its hydrolysis product, 4- (A -maleamido) benzyltrimethylammonium iodide. The concentrations in moles per liter of [ HJMBTA (a) and its hydrolysis product (b) are determined from their molar extinction coefficients and absorbances at 224, 238.7 (isosbestic point), 260, and 290 nm. The absorbances at any... [Pg.585]


See other pages where Benzyltrimethylammonium iodide is mentioned: [Pg.45]    [Pg.61]    [Pg.62]    [Pg.86]    [Pg.32]    [Pg.54]    [Pg.94]    [Pg.95]    [Pg.52]    [Pg.422]    [Pg.422]    [Pg.44]    [Pg.760]    [Pg.54]    [Pg.260]    [Pg.81]    [Pg.197]    [Pg.250]   
See also in sourсe #XX -- [ Pg.34 , Pg.61 ]

See also in sourсe #XX -- [ Pg.34 , Pg.61 ]

See also in sourсe #XX -- [ Pg.422 ]

See also in sourсe #XX -- [ Pg.53 , Pg.684 , Pg.1039 ]

See also in sourсe #XX -- [ Pg.34 , Pg.61 ]

See also in sourсe #XX -- [ Pg.34 , Pg.61 ]

See also in sourсe #XX -- [ Pg.81 ]




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