ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Preparation of 3-Alkoxy-4-alkyl-3-cyclobutene-1,2-dionesSeveral squaric acid esters (2a-g) are prepared. They react with Grignard compounds to give the title compounds (11a-n). 1,2- vs. 1,4-Grignard addition and the benzyl-tolyl rearrangement coincidental with the Grignard reaction are discussed. Hydrolysis of compounds 11 leads to 4-alkyl-3-hydroxy-3-cyclobutene-1,2-diones (12).
Notes:
Verschiedene Quadratsäureester (2a-g) werden dargestellt und mit Grignard-Reagentien in die Titelverbindungen (11a-n) verwandelt. 1,2- gegen 1,4-Grignard-Additionen und die Benzyl-Tolyl-Umlagerung bei der Grignard-Reaktion werden diskutiert. Hydrolyse der Verbindungen 11 liefert 4-Alkyl-3-hydroxy-3-cyclobuten-1,2-dione (12).
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19801130103
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