Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/569
Type: Artigo de periódico
Title: Recognition of cyclic, acyclic, exocyclic, and spiro Acetals via structurally diagnostic ion/molecule reactions with the (CH3)(2)N-C+=O acylium ion
Author: BENASSI, Mario
MORAES, Luiz Alberto B.
CABRINI, Liliane G.
DIAS, Luiz Carlos
AGUILAR, Andrea M.
ROMEIRO, Gilberto A.
EBERLIN, Livia S.
EBERLIN, Marcos N.
Abstract: Reactions of the model acylium ion (CH3)(2)N-C+=O with acyclic, exocyclic, and Spiro acetals of the general formula (RO)-O-1-(CRR4)-R-3-OR2-upole mass spectrometry. Characteristic intrinsic reactivities were observed for each of these classes of acetals. The two most Characteristic intrinsic reactivities were observed for each of these classes of acetals. The two most common reactions observed were hydride and alkoxy anion [(RO-)-O-1 and (RO-)-O-2] abstraction. Other specific reactions were also observed: (a) a secondary polar [4(+) + 2] cycloaddition for acetals bearing alpha,beta-unsaturated R-3 or R-4 substituents and (b) OH- abstraction for exocyclic and spiro acetals. These structurally diagnostic reactions, in conjunction with others observed previously for cyclic acetals, are shown to reveal the class of the acetal molecule and its ring type and substituents and to permit their recognition and distinction from other classes of isomeric molecules.
Country: Estados Unidos
Editor: AMER CHEMICAL SOC
Citation: JOURNAL OF ORGANIC CHEMISTRY, v.73, n.14, p.5549-5557, 2008
Rights: fechado
Identifier DOI: 10.1021/jo8008269
Address: http://dx.doi.org/10.1021/jo8008269
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Date Issue: 2008
Appears in Collections:IQ - Artigos e Materiais de Revistas Científicas

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