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Stereochemistry of seven-membered heterocycles. Communication 14. Synthesis and three-dimensional structure of 4-methyl-1,3-dioxa-5,6-benzocycloheptenes
Authors
Arbuzov B.
Klimovitskii E.
Sergeeva G.
Strel'nik D.
Publication date
29 February 2020
Publisher
Abstract
1. On the basis of data obtained by the dipole moment method, cis-2-methyl (or phenyl)-4-methyl-1,3-dioxa-5,6-benzocycloheptenes have an equilibrium of chair and twist forms that is close in quantitative respects to the related 2-R-phthalyacetals; the spiroketal of cyclohexanone is realized in the e-Tw form; the methylal is conformationally inhomogeneous. 2. The isomeric 2-tert-butyl-4-methyl-1,3-dioxa-5,6-benzocycloheptenes, according to13C NMR data, are realized in chair conformations. An analysis has been made of the influence of the 4-methyl group on the chemical shifts of the carbon atoms of the seven-membered ring. © 1985 Plenum Publishing Corporation
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oai:rour.neicon.ru:rour/171402
Last time updated on 04/04/2020
National Open Repository Aggregator (NORA)
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:rour.neicon.ru:rour/137647
Last time updated on 04/04/2020