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• W1989270760 endingPage "6930" @default.
• W1989270760 startingPage "6927" @default.
• W1989270760 abstract "The synthesis and chemical reactivity of pyridazinedione-based enediynes (1, 2) are described. Both of these enediynes, namely the dihydro compound 1 and its corresponding tetrahydro analogue 2, were prepared by double N,O-alkylation of the corresponding heterocyclic system with the acyclic enediynyl dibromide 8 in good yields. Their single-crystal X-ray structures revealed similar c, d distances (distance between the acetylenic carbons undergoing covalent connection in Bergman cyclization). Interestingly, these molecules undergo Bergman cyclization at different rates, and the reactivity is shown to be dependent upon the state of hybridization of C-4 and C-5 atoms of the parent heterocyclic ring." @default.
• W1989270760 created "2016-06-24" @default.
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• W1989270760 date "2004-09-08" @default.
• W1989270760 modified "2023-10-11" @default.
• W1989270760 title "Effect of Remote Trigonal Carbons on the Kinetics of Bergman Cyclization: Synthesis and Chemical Reactivity of Pyridazinedione-Based Enediynes" @default.
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• W1989270760 doi "https://doi.org/10.1021/jo049396d" @default.
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