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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fragmentation Reactions of Carbonyl Compounds with Electronegative β-Substituents, XXXII: Reaction of 2,2-Dialkyl-1-cyclohexyl-3-tosyloxy-1-propanone with NucleophilesTosylates 6 and 12 are synthesized starting from ketones 4 and 10,6 and 12 react with CH3Li to yield the oxetanes 17 and 20. LiBH4 reduction of 6 and 12 leads to the oxetanes 16 and 19, as well as to the tosyloxy alcohols 21 and 22. The neopentyl substitution products 7 and 13 are obtained from 6 and 12 with KCN in DMSO, whereas from 6 the cyano oxetane 18 was isolated too. With potassium tert-butoxide 6 reacts to give the enol ether 23, whereas 12 leads to the cyclo-butanone 25. The triflate 14 react with NaOCH3 to give the substitution product 15.
    Notes: Ausgehend von den Ketonen 4 und 10 werden die Tosylate 6 und 12 dargestellt, die mit CH3Li zu den Oxetanen 17 bzw. 20 reagieren. LiBH4-Reduktion von 6 bzw. 12 führt zu den Oxetanen 16 bzw. 19. daneben werden die Tosyloxy-alkohole 21 bzw. 22 isoliert. setzt man 6 bzw. 12 mit KCN in DMSO um, so werden die Neopentylsubstitutionsprodukte 7 bzw. 13, daneben aus 6 auch das Cyan-oxetan 18 erhalten. Mit Kalium-tert-butylalkoholat erhält man aus 6 den Enol-äther 23, dagegen aus 12 das Cyclobutanon 25. Das Triflat 14 reagiert mit NaOCH3 unter Substitution zu 15.
    Type of Medium: Electronic Resource
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