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- W2949761323 abstract "for ether cleavage were also proposed as shown inScheme 1. The 5-membered acetoxonium intermediate 5,which was formed through selective C5-O6 bond cleavage,was the key and common intermediate for the products 2a,3a and 4a. The enone 2a was formed via regioselectivenucleophilic attack of iodide ion (secondary vs tertiary car-bon) followed by deiodo-olefination. The acetate anion wasalso produced during this process and used as a nucleophileon the intermediate 5 to make diacetate 4a. The mono-acetated ethylene 3a was formed from the elimination reac-tion of the intermediate 5 by the iodide or acetate ion as abase.For clear explanation for these transformation mechanisms,we introduced deuterated methyl at C7 as a 2 : 1 ratio of exo-acetal 1b and endo-acetal 1c from the methyl vinyl ketone(MVK) dimer 7 (Scheme 2). The exo-preference by usingGrignard reagent in this system has been known." @default.
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- W2949761323 date "1999-01-01" @default.
- W2949761323 modified "2023-09-23" @default.
- W2949761323 title "STUDY ON THE NOVEL REARRANGEMENT REACTION OF BICYCLIC ACETAL COMPOUND BY USING ACCL-NAI" @default.
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