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78249233078
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The reaction of 3m gave the normal product 5m in 42% yield, along with a 28% yield of 5m′.
-
The reaction of 3m gave the normal product 5m in 42% yield, along with a 28% yield of 5m′.
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79
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78249257101
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If the reaction of 3o was quenched after 1 h, a 10% yield of 5o could be obtained, along with a 45% yield of isomer 5o′ and 10% of 3o was recovered.
-
If the reaction of 3o was quenched after 1 h, a 10% yield of 5o could be obtained, along with a 45% yield of isomer 5o′ and 10% of 3o was recovered.
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80
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78249247212
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A 15% yield of decarboxylation product 4r′ was produced.
-
A 15% yield of decarboxylation product 4r′ was produced.
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81
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78249231222
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An alternative stepwise strategy for the synthesis of 5a was also tested. However, after many attempts, the Sonogashira coupling of 6a with phenyl acetylene failed under various commonly used conditions. These results indicate that our present one-pot strategy has an advantage over the stepwise strategy.
-
An alternative stepwise strategy for the synthesis of 5a was also tested. However, after many attempts, the Sonogashira coupling of 6a with phenyl acetylene failed under various commonly used conditions. These results indicate that our present one-pot strategy has an advantage over the stepwise strategy.
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CCDC-760111 (5k) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via.
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CCDC-760111 (5k) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via.
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