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- W2087919703 abstract "Diels–Alder reaction of 5-acetyl-3-methylthio-1,2,4-triazine with five cyclic enamines has been reinvestigated in its preparative and theoretical aspects. Its regioselectivity has been developed practically, which is in agreement with theoretical consideration of the FMO interactions, including secondary orbital interactions in the transition state. Since the energetic demands are similar for all five pairs, it has been indicated that their reactivity differences can be explained by an influence of steric hindrance in the considered transition state. In result, the synthesis of the 3-acetyl-1-methylthiocycloalka[c]pyridines, as synthons for preparation of sempervirine and its analogues has been optimized. The subsequent side reaction has been detected as a serious problem, especially in the case of the six-membered enamine, which reacts with the acetyl group of the final product formed in the reaction mixture." @default.
- W2087919703 created "2016-06-24" @default.
- W2087919703 creator A5020664860 @default.
- W2087919703 date "2005-08-01" @default.
- W2087919703 modified "2023-09-24" @default.
- W2087919703 title "Experimental and theoretical FMO interaction studies of the Diels–Alder reaction of 5-acetyl-3-methythio-1,2,4-triazine with cyclic enamines" @default.
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- W2087919703 doi "https://doi.org/10.1016/j.tet.2005.06.043" @default.
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