Über ein bicyclisches Lacton aus Citryliden‐essigsäure

Tribolet, P. de; Gamboni, G.; Schinz, H.

doi:10.1002/hlca.19580410615

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1973

2011

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The R eformatsky Reaction

Rathke

2011

Organic Reactions

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The Reformatsky reaction is the reaction of a carbonyl compound, usually an aldehyde or a ketone, with an alpha‐haloester in the presence of zinc metal to furnish, after hydrolysis, a β‐hydoxyester. Subsequent dehydration of the hydroxyester is commonly carried out to form an alpha, β‐unsaturated ester. This chapter summarizes some of the more important advances in the understanding and use of the Reformatsky reaction since the original chapter was published in volume 1 of this series.

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The R eformatsky Reaction

Rathke

2011

Organic Reactions

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Absolute Konfiguration der enantiomeren α‐CyclogeraniumsäUren, α‐Cyclogeraniale, α‐Jonone, γ‐Jonone, α‐und ϵ‐Carotine

Buchecker

Egli

Regel-Wild

et al. 1973

Helvetica Chimica Acta

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b) OVW Palladium. Coleon J (25 nig) was shaken in 2-propanol (5 ml) with 10% palladium on charcoal (30 mg) under hydrogen for 4 h. The filtered solution was evaporated to give a yellow oil which was shown to be a complex mixture (TLC. on silica gel in chloroform). Three pale yellow bands, separated by TLC. (each < 1 mg) had identical UV.jV1S. (CH,OH) (qual.): 275, 400;(CH,OH/NaOH) (qual.) : 282, 515, b u t were not investigated further. Absolute Konfiguration der enantiomeren a-Cyclogeraniumsauren, a-Cyclogeraniale, a-Jonone, y-Jonone, a-und s-Carotine Summary. By chemical correlation with inariool and ambrein the absolute configurations of the enantiomeric a-cyclogeranic acids, a-cyclogeranials. cc-ionones and aand 8-carotcncs have been elucidated. Einleitung . -Die vorliegende Arbeit erganzt und erweitert unsere vorlaufige Mitteilung von 1969 [5]. Die Zahl der strukturell bekannten Carotinoide durfte heute gegen 300 betragen. Von diesen sind mehr als 200 chiral. Zu Beginn dieser Arbeit war nodl von keineni einzigen Carotin die absolute Konfiguration bekannt. 1957 [6] und 1958 [7] syntheti-1) Diplomarbeit,

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