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- W4248024205 abstract "[1712-36-3] C7H8O4 (MW 156.15) (reactive in Diels–Alder cycloadditions that yield homophthalate diesters1 and six-membered heterocycles,2 in dipolar cycloadditions that yield five-membered heterocycles,3 and in tandem conjugate addition–cyclization reactions to yield various heterocyclic systems4) Alternate Names: 1,3-dimethoxycarbonylallene. Physical Data: bp 58 °C/0.02 mmHg. Solubility: sol THF, benzene, acetonitrile, DME, MeOH. Analysis of Reagent Purity: 1H NMR (CDCl3) δ 3.81 (s, 6H), 6.10 (s, 2H). IR (film) cm−1 1970, 1720, 1440. Preparative Method: although not commercially available, dimethyl 2,3-pentadienedioate can be prepared by the route outlined in eq 15 to give approximately 13 g of the reagent per run. (1) Purification: vacuum distillation. Handling, Storage, and Precautions: dimethyl 2,3-pentadienedioate (1) polymerizes during distillation, necessitating that purification by this method be carried out in small batches. Upon standing, even overnight at refrigerator temperature, (1) becomes yellow and then orange and viscous. Preparation of amounts of (1) that will be immediately consumed, or storage of the vinyl chloride precursor and conversion to (1) as needed, appear to be warranted. This reagent should be handled in a fume hood." @default.
- W4248024205 created "2022-05-12" @default.
- W4248024205 creator A5051923307 @default.
- W4248024205 date "2001-04-15" @default.
- W4248024205 modified "2023-09-27" @default.
- W4248024205 title "Dimethyl 2,3-Pentadienedioate" @default.
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- W4248024205 doi "https://doi.org/10.1002/047084289x.rd351" @default.
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