Formation of β-Lactones by [2+2] Cycloaddition of Dichloroketene with Unreactive Carbonyl Compounds
Xu Dong , Chunxia Zhang , Jian Xu , Yue Zhang , Ying Zhao , Li Chen
Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (5) : 736 -743.
Formation of β-Lactones by [2+2] Cycloaddition of Dichloroketene with Unreactive Carbonyl Compounds
We report a modified process that dichloroketene generated in situ from trichloroacetyl chloride and Zn powder reacts with unreactivate carbonyl groups to afford dichloro-β-lactones in moderate to good yields. Subse-quently, monochloro-β-lactones, β-lactones and β-hydroxy ester are obtained by dechlorination under different reac-tion conditions.
Dichloroketene / Unreactive carbonyl group / β-Lactone / [2+2] Cycloaddition
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| [2] |
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| [3] |
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| [4] |
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| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
|
| [38] |
|
| [39] |
|
| [40] |
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| [41] |
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