ZfN: Search Results

1	Author	H. H. Baalmann, R. Keizer, J. C. Van De Grampel, C. Kruk	Requires cookie*
	Title	Derivatives of eis-NPC12(NS0C1)2 and (NPC12)2NS0C1, Part IX [1] Substitution Reactions of eis-NPC12(NS0C1)2 with Piperidine
	Abstract	Aminolysis of cis-NPCl2(NSOCl)2 by piperidine in acetonitrile at room temperature proceeds via a non-geminal substitution pattern. During the first substitution step the reactivity of a SOCl-centre appears to be greater than that of a PCl2-centre. The second and third substitution step successively take place at the PC12-and remaining SOCl-centre. The different isomeric forms of the mono-, bis-, tris-, and tetrakis(piperidino) derivatives are characterized by means of 31 P NMR data. Application of 13 C NMR leads in two cases to a structure assignment.
	Reference	Z. Naturforsch. 33b, 959—963 (1978); received June 26 1978
	Published	1978
	Keywords	Aminolysis, Reaction Pattern, Structure Assignment
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	TEI-XML for	default:Reihe_B/33/ZNB-1978-33b-0959.pdf
	Identifier	ZNB-1978-33b-0959
	Volume	33

2	Author	Volker Böhmer, Klaus Wörsdörfer	Requires cookie*
	Title	Nachbargruppeneffekte bei der Aminolyse von Estern, II Die Aminolyse von 2-(2-Hydroxybenzyl)phenylacetaten Neighboring Group Effects in the Aminolysis of Esters, II The Aminolysis of 2-(2-Hydroxybenzyl)phenylacetates
	Abstract	The aminolysis of 2-(2-hydroxybenzyl)phenyl acetates with w-butylamine in dioxane is much faster than for the corresponding 2-(2-methoxybenzyl)phenyl acetates or 2-methyl-phenyl acetates. The kinetic results can be explained by two equivalent mechanisms. Both of them include the formation of a l:l-complex between 2-(2-hydroxybenzyl)phenyl acetate and n-butylamine which is formed in an equilibrium. The reaction of this complex according to a second order rate law seems to be more probable than the reaction of the free ester according to a third order rate law.
	Reference	Z. Naturforsch. 33b, 439—449 (1978); eingegangen am 30. Dezember 1977
	Published	1978
	Keywords	Kinetics, Aminolysis, Aprotic Solvent, Neighboring Group Effects, 2 -(2 -Hy droxybenzy 1 )phenylacetates
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	TEI-XML for	default:Reihe_B/33/ZNB-1978-33b-0439.pdf
	Identifier	ZNB-1978-33b-0439
	Volume	33