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5-Chloro-2-furaldehyde → 1-(5-Chloro-furfurylidene-amino)-2,3-dioxo-piperazine
関与物質
| 役割 | 名称 | HCID | 仕込み量 |
|---|---|---|---|
| 反応物 | 5-Chloro-2-furaldehyde | HCID 2769630 | — |
| 反応物 | 1-Aminopiperazine-2,3-dione | HCID 22184768 | — |
| 溶媒 | Acetic Acid | HCID 176 | — |
| 生成物 | 1-(5-Chloro-furfurylidene-amino)-2,3-dioxo-piperazine | HCID 54037539 | 74.6% |
反応手順
1.6 pts. by wt. of 5-chloro-furfural, 1.3 pts. by wt. of 1-amino-2,3-dioxo-piperazine and 7 pts. by vol. of glacial acetic acid are warmed to 90° C. for 10 minutes and then left for 30 minutes at RT. The precipitate is filtered off, washed first with 3 pts. by vol. of glacial acetic acid and then twice with 10 pts. by vol. of acetonitrile each time and dried in air. 1.8 pts. by wt. (74.6%) of 1-(5-chloro-furfurylidene-amino)-2,3-dioxo-piperazine are obtained as yellowish crystals of decomp. pt. 233°-6° C.
情報源と証拠
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 特許番号 | US04182762 |
| 出典データセット | uspto-grants-1980_01 |
| ORD ID | ord-dd26e4d2762f451a9ea948170f20d677 |
| 出典メモ | uspto-grants-1980_01 |