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Dibenzyl amine

Improved selectivities were observed with the enone 148 using the dibenzyl amine as the chiral controlling unit at the y-position, delivering essentially a single product from the reaction (Scheme 3.43). [Pg.196]

NOTE Higher nitrated derivs of Dibenzyl-amine were not found in Beil or in CA thru 1961... [Pg.83]

Others 1,4-dioxane, 1,3,5-trioxane, terahydrofuran, 2-butyl tetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide, epsilon-caprolactam, benzothiazole, biphenyl, pyrazine, 2-butanone oxime, l-methyl-2-pyrrolidone, N,N-dimethyl-aniline, N,N-dimethyl-p-toluidine, l-methyl-7-isopropyl phenanthrene, dibenzyl-amine, hexamethylenetetramine, squalene, 2-ethylanthraquinone... [Pg.408]

Glaziovine, apoglaziovine, nantenine, and a new base variabiline (C32H3202N2 mp 116° [a]D 0°) have been isolated from this plant. Spectral examination pointed to structure 137 for the new alkaloid and its preparation from (+ )-glaziovine (138) by heating it with dibenzyl-amine and the hydrochloride for 2 hr at 200-210° confirmed the structure (125). [Pg.291]

Photoinduced electron transfer reactions of aminoalkyl-substituted phthalimides are highly exergonic, but since amines are potent hydrogen donors, photoreductions are commonly observed side-reactions. The product spectrum parallels that of the thioether case (vide supra) although yields were in general lower [28]. Higher conversions and yields up to 39% were obtained for dibenzylated amines [28c]. [Pg.275]

Asymmetric hydrogenation of either a carbonyl or an imino group to a hydroxyl group or an amino group has frequently been employed for the introduction of chirality in amino acid syntheses. Corey s catecolborane-oxazaborolidine protocol enables transformation of difluoromethyl ketone 1 into alcohol 2 with excellent enantioselectivity. The reaction of diastereoselective amination of a-hydroxyaldehyde 3 with A,A-diallylamine and 2-furyl-boronic acid provides furyl amino alcohol 4 in good chemical yield along with excellent diastereoselectivity. This protocol is applicable for the preparation of amino acids and amino alcohols with a trifluoromethyl group by the combination of /V,/V-diallyl or N,N-dibenzyl amine and aromatic, heteroaromatic and alkenyl boronic acids [7]. The usual chemical transformations as shown in steps 5 to 8 in Scheme 9.1 lead to (2S,3R) difluorothreonine 5 [8]. [Pg.214]

Dibenzyl carbonate, Pb4PBr, 150-170°C, neat, 76-93% yield. These conditions give dibenzyl amines with only minimal amounts of the carbamates. ... [Pg.815]

Mannich reactionsJ The reaction of methoxymethyl(dibenzyl)amine with silyl enol ethers proceeds at low temperatures in the presence of BFj-OEt A bulky silyl group at the a -position of the enol ether can serve as a stereocontrol element. [Pg.46]

Tables VIII and IX show that all of the substituted dibenzyl-amines, N-benzylphenethylamine, and N-benzyl-2-naphthalenemethyl-amine, and all of the secondary amines stimulated the production of poly-cis-carotenes. Tables X, XI, and XII show the ability of substituted N-benzylfurfurylamines N-benzyl,N-methy1furfury1-amines and N-alkyl,N-methylbenzylamines to stimulate the formation of poly-cis-carotenes. Tables VIII and IX show that all of the substituted dibenzyl-amines, N-benzylphenethylamine, and N-benzyl-2-naphthalenemethyl-amine, and all of the secondary amines stimulated the production of poly-cis-carotenes. Tables X, XI, and XII show the ability of substituted N-benzylfurfurylamines N-benzyl,N-methy1furfury1-amines and N-alkyl,N-methylbenzylamines to stimulate the formation of poly-cis-carotenes.
TBzTD and ZBzTD do, in fact, generate stable nitrosamines from the secondary amine dibenzyl amine however, this nitrosamine is nonvolatile and is not readily released from the vulcanized product into the atmosphere. It is also considered noncarcinogenic (18). Therefore, these materials are considered non-nitrosamine in usage. IBT likewise generates a stable nitrosamine but its level has been claimed to be 100 times less than TMTD (19). [Pg.7251]

Dioxy-3.6-diphenyl-2-benzyl-pjTidin 21,195,1 248, II155. 4-Phenyl-2-[2-oxy-phenyl]-6-[2.oxy-4-me(hyl-phenyl]-pyTidm 21II155. a.a -[2.7-Dk>iy-naphthyl i-(t. 8) ]-dibenzyl amin 21,165. [Pg.2972]

Irradiation of the tertiary N-methyl,N-phenyl amines 29 gave the corresponding cycHzation products 30 in yields of 6 to 20% (Scheme 10 Table 84.3). The regioselectivity of the mesolytic CH-activation step was pronounced, except for the case where n = 4. This observation goes parallel with the thioether case vide supra). The conversions were low for the precursors to medium-sized ring systems higher conversions and yields up to 39% were obtained for dibenzylated amines. ... [Pg.1701]


See other pages where Dibenzyl amine is mentioned: [Pg.222]    [Pg.192]    [Pg.902]    [Pg.936]    [Pg.1101]    [Pg.222]    [Pg.170]    [Pg.170]    [Pg.203]    [Pg.313]    [Pg.264]    [Pg.1046]    [Pg.192]    [Pg.270]    [Pg.313]    [Pg.120]    [Pg.309]    [Pg.309]    [Pg.437]    [Pg.1261]    [Pg.2812]    [Pg.67]    [Pg.224]    [Pg.144]    [Pg.148]    [Pg.390]    [Pg.361]    [Pg.2263]   
See also in sourсe #XX -- [ Pg.201 ]




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