| 2 | 1/1 | 返回列表 |
| 查看: 816 | 回復(fù): 1 | |||
| 本帖產(chǎn)生 1 個 翻譯EPI ,點擊這里進(jìn)行查看 | |||
王磊磊0811至尊木蟲 (著名寫手)
|
[求助]
求一篇論文中的幾句話翻譯
|
||
|
最近看關(guān)于鈀催化氧化的文獻(xiàn),有幾句話需要專業(yè)點翻譯,請教各位蟲友幫助 An efficient Pd(II)-catalyzed difunctionalization reaction of internal alkynes is reported. In this reaction, various enynoates and electron-deficient alkenes were used for the syntheses of useful highly substituted pyrone derivatives via a 6-endo cyclization and subsequent alkenylation pathway. First, a 6-endo cyclization of the enynoate will occur which was activated by the alkyne Pd(II) ion. Therefore, an active vinylpalladium species B will be generated to react with methyl acrylate and afford the intermediate C via migratory insertion. The desired product 3a could be formed after reductive elimination and followed by the reoxidation of Pd(0) species into the next catalytic cycle by benzoquinone (BQ). |
鐵蟲 (正式寫手)
|
據(jù)報道,高效的Pd(II)能催化炔烴內(nèi)部相鄰兩個官能團(tuán)的反應(yīng),在這個反應(yīng)中,戊烯炔酸甲酯和缺電子烯烴分別通過六元環(huán)內(nèi)切環(huán)合和鏈烯基化路徑,來合成得到重要的高取代性的吡喃酮衍生物。 首先, 由Pd(II)離子激活發(fā)生戊烯炔酸甲酯的炔烴六元環(huán)內(nèi)切環(huán)化反應(yīng),這樣, 生成一個活性的乙烯基鈀物質(zhì)B與丙烯酸甲酯通過遷移插入產(chǎn)生反應(yīng)生成中間體C,經(jīng)Pd(0) 物質(zhì)消除還原后再氧化進(jìn)入下一個苯醌的催化循環(huán),可得到所需的產(chǎn)物3a。 |
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 求調(diào)劑一志愿海大,0703化學(xué)學(xué)碩304分,有大創(chuàng)項目,四級已過 +5 | 幸運哩哩 2026-03-22 | 9/450 |
|
|---|---|---|---|---|
|
[考研] 298求調(diào)劑 +5 | 上岸6666@ 2026-03-20 | 5/250 |
|
|
[考研] 求調(diào)劑 +5 | Zhangbod 2026-03-21 | 7/350 |
|
|
[考研] 303求調(diào)劑 +5 | 安憶靈 2026-03-22 | 6/300 |
|
|
[考研] 384求調(diào)劑 +3 | 子系博 2026-03-22 | 4/200 |
|
|
[考研] 材料學(xué)碩301分求調(diào)劑 +7 | Liyouyumairs 2026-03-21 | 7/350 |
|
|
[考研] 297求調(diào)劑 +3 | 喜歡還是不甘心 2026-03-20 | 3/150 |
|
|
[考研] 【考研調(diào)劑】化學(xué)專業(yè) 281分,一志愿四川大學(xué),誠心求調(diào)劑 +11 | 吃吃吃才有意義 2026-03-19 | 11/550 |
|
|
[考研] 313求調(diào)劑 +4 | 肆叁貳壹22 2026-03-19 | 4/200 |
|
|
[考研] 310求調(diào)劑 +3 | baibai1314 2026-03-16 | 3/150 |
|
|
[考研] 機(jī)械專碩299求調(diào)劑至材料 +3 | kkcoco25 2026-03-16 | 4/200 |
|
|
[考研] 265求調(diào)劑 +9 | 梁梁校校 2026-03-17 | 9/450 |
|
|
[考研] 一志愿中海洋材料工程專碩330分求調(diào)劑 +8 | 小材化本科 2026-03-18 | 8/400 |
|
|
[考研] 中南大學(xué)化學(xué)學(xué)碩337求調(diào)劑 +3 | niko- 2026-03-19 | 6/300 |
|
|
[考研] 工科材料085601 279求調(diào)劑 +7 | 困于星晨 2026-03-17 | 9/450 |
|
|
[考研] 298-一志愿中國農(nóng)業(yè)大學(xué)-求調(diào)劑 +9 | 手機(jī)用戶 2026-03-17 | 9/450 |
|
|
[考研] 085601材料工程專碩求調(diào)劑 +10 | 慕寒mio 2026-03-16 | 10/500 |
|
|
[考研] 收復(fù)試調(diào)劑生 +4 | 雨后秋荷 2026-03-18 | 4/200 |
|
|
[考研] 277調(diào)劑 +5 | 自由煎餅果子 2026-03-16 | 6/300 |
|
|
[考研] 275求調(diào)劑 +4 | 太陽花天天開心 2026-03-16 | 4/200 |
|