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- W2054222425 abstract "Das proximale (S,S)-1,1′-Dimethyl-2,2′-spirobiindan (1a) wird racemisch und zu mehr als 98.5% enantiomerenrein dargestellt. Seine absolute Konfiguration ist durch den Syntheseweg eindeutig bestimmt. Schlüsselschritte der Synthese sind die trans-Alkylierung von 3 zu 4a und die praktisch einheitlich verlaufende Hydrogenolyse des Gemisches von 10a und 10b zu 1a. Dieses ist eines von drei möglichen Diastereomeren 1a–c, die zum Test der Theorie der Hyperchiralität dienen sollen. Synthesis and Determination of the Absolute Configuration of the Proximal (S,S)-1,1′-Dimethyl-2,2′-spirobiindane The proximal (S,S)-1,1′-dimethyl-2,2′-spirobiindane (1a) is synthesized as the racemic mixture and with more then 98.5% optical purity. Its absolute configuration is determined by the path of synthesis. Key-steps are the trans-alkylation of 3 yielding 4a and the hydrogenolysis of the mixture of 10a and 10b yielding practically exclusively 1a. This is one of three possible diastereoisomers 1a–c which are needed to test the theory of hyperchirality." @default.
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- W2054222425 date "1982-05-01" @default.
- W2054222425 modified "2023-10-18" @default.
- W2054222425 title "Synthese und Bestimmung der absoluten Konfiguration des proximalen ( <i>S</i> , <i>S</i> )‐1,1′‐Dimethyl‐2,2′‐spirobiindans" @default.
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- W2054222425 doi "https://doi.org/10.1002/cber.19821150520" @default.
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