ISSN:
0947-3440
Schlagwort(e):
Carbohydrates
;
Glycosides
;
Cyclizations
;
C—C coupling
;
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The “push-pull”-activated pyranosidulose 1 reacts with acetylacetone and ethyl acetoacetate to give the methyl pyrano-[2′,3′:7,8]pyrano[3,2-D][1,3]dioxin-9-yl ketone 2a and the pyrano[2′,3′:7,8]pyrano[3,2-D][1,3]dioxine-9-carboxylate 2b. Treatment of 1 with 1,3-cyclohexanediones leads to the 1,3-dioxino[5′,4′:3,4]pyrano[3,4-B]chromen-11-ones 4a and 4b. Dialkyl benzo[7,8]pyrano[3,2-D][1,3]dioxine-7,9-dicarboxylates 5a and 5b were obtained by reaction of ulose 1 with dialkyl 3-oxoglutarates.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/jlac.199719970534
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