3-Bromo-2,5-dihydrofuran-2-one and 4-Bromo-2,5-dihydrofuran-2-one

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Title:3-Bromo-2,5-dihydrofuran-2-one and 4-Bromo-2,5-dihydrofuran-2-one
Creators:
Brecker, Lothar
Kreiser, Wolfgang
Ernst, Ludger
Hopf, Henning
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 64, 7, pp. 1154-1158
Uncontrolled Keywords:Revision, Bromo-2,5-dihydrofuran-2-ones, Structure assignments, Butenolides, Lactones, NMR spectroscopy

Abstract

Although 3-bromo-2,5-dihydrofuran-2-one and 4-bromo-2,5-dihydrofuran-2-one were first reported in 1894, considerable ambiguity still exists about the correct structure assignment of the two compounds. The present article gives a brief overview on the varying assignments of constitution and describes a novel method for the formation of 3-bromo-2,5-dihydrofuran-2-one. A comparison is made of the experimental <sup>13</sup>C&nbsp;NMR chemical shifts with values predicted by increment calculations and experimental <sup>1</sup><i>J</i><sub>C-C</sub> coupling constants are given for both compounds. Secure structural assignments are now available for both isomers. <p>

Title:3-Bromo-2,5-dihydrofuran-2-one and 4-Bromo-2,5-dihydrofuran-2-one
Creators:
Brecker, Lothar
Kreiser, Wolfgang
Ernst, Ludger
Hopf, Henning
Uncontrolled Keywords:Revision, Bromo-2,5-dihydrofuran-2-ones, Structure assignments, Butenolides, Lactones, NMR spectroscopy
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:64
Number:7
Page Range:pp. 1154-1158
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19991154UNSPECIFIED
ID Code:1547
Item Type:Article
Deposited On:06 Feb 2009 17:10
Last Modified:06 Feb 2009 16:10

Citation

Brecker, Lothar; Kreiser, Wolfgang; Ernst, Ludger; Hopf, Henning (1999) 3-Bromo-2,5-dihydrofuran-2-one and 4-Bromo-2,5-dihydrofuran-2-one. Collection of Czechoslovak Chemical Communications, 64 (7). pp. 1154-1158. ISSN 0010-0765

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