 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 958 | 回復(fù): 7 | ||
| 本帖產(chǎn)生 1 個(gè) 博學(xué)EPI ，點(diǎn)擊這里進(jìn)行查看 | ||
| 當(dāng)前只顯示滿足指定條件的回帖，點(diǎn)擊這里查看本話題的所有回帖 | ||
whb265金蟲 (小有名氣)
|
[求助]
求助Boc亞胺的合成方法
|
|
求助Boc亞胺的合成方法 |
回復(fù)此樓» 猜你喜歡
311求調(diào)劑
已經(jīng)有6人回復(fù)
-
289求調(diào)劑
已經(jīng)有25人回復(fù)
-
329求調(diào)劑
已經(jīng)有10人回復(fù)
-
材料考研調(diào)劑
已經(jīng)有9人回復(fù)
-
327求調(diào)劑
已經(jīng)有7人回復(fù)
-
材料科學(xué)與工程調(diào)劑
已經(jīng)有18人回復(fù)
-
337求調(diào)劑
已經(jīng)有11人回復(fù)
-
301求調(diào)劑
已經(jīng)有5人回復(fù)
-
275求調(diào)劑
已經(jīng)有11人回復(fù)
-
292求調(diào)劑
已經(jīng)有14人回復(fù)
121918051
至尊木蟲 (著名寫手)
- 博學(xué)EPI: 12
- 應(yīng)助: 1 (幼兒園)
- 金幣: 10941.1
- 散金: 30
- 紅花: 17
- 帖子: 2764
- 在線: 634.8小時(shí)
- 蟲號: 999319
- 注冊: 2010-04-17
- 專業(yè): 有機(jī)合成
3樓2010-10-27 09:29:56
whb265
金蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 2.8
- 散金: 5
- 帖子: 221
- 在線: 124.3小時(shí)
- 蟲號: 637859
- 注冊: 2008-10-27
- 專業(yè): 高分子物理與高分子物理化
2樓2010-10-26 18:42:01
寒月龍飛
木蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 1789.1
- 帖子: 214
- 在線: 105.1小時(shí)
- 蟲號: 346841
- 注冊: 2007-04-15
- 性別: GG
- 專業(yè): 化學(xué)生物學(xué)與生物有機(jī)化學(xué)
【答案】應(yīng)助回帖
|
兩步做：先合成氨基亞砜類化合物，第二部用碳酸鉀催化脫去亞磺酸集團(tuán)。一 A 500-mL flask was charged with tert-butyl carbamate (10.0 g, 85.5 mmol, 1.00 equiv) and benzenesulfinic acid sodium salt (28 g, 170 mmol, 2.0 equiv). Solids were suspended in a solution of methanol in water (1:2, 250 mL). Benzaldehyde (13.0 mL, 128 mmol, 1.50 equiv) was then added in one portion, followed by formic acid (98%, 6.4 mL). The reaction was allowed to stir 48 h at 23 °C, during which time the product precipitated as a white solid. which was isolated via Büchner funnel filtration and purified via trituration with water and diethyl ether. After drying in vacuo, 7a was obtained as a white solid (23.6 g, 80%).二 A 250-mL, 3-neck flask was charged with anhydrous potassium carbonate (12.4 g, 90.0 mmol, 6.00 equiv) and anhydrous sodium sulfate (15 g). The solids were placed under vacuum and flame-dried. Once cool, 7a (5.2 g, 15 mmol, 1.0 equiv) was added under a positive stream of nitrogen, followed by anhydrous tetrahydrofuran (140 mL). The flask was capped with a water-cooled reflux condenser under an atmosphere of nitrogen and heated to reflux with stirring. After 15 h, the reaction was cooled to ambient temperature and the solids removed via filtration through a fine, glass frit. The filtrate was concentrated in vacuo and dried under high vacuum to give imine as a colorless oil |
6樓2010-11-08 20:24:51
寒月龍飛
木蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 1789.1
- 帖子: 214
- 在線: 105.1小時(shí)
- 蟲號: 346841
- 注冊: 2007-04-15
- 性別: GG
- 專業(yè): 化學(xué)生物學(xué)與生物有機(jī)化學(xué)
7樓2010-11-08 20:26:23
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[基金申請]
請問共同通訊和共同一作的認(rèn)可度問題
 30+3
|
psa1234 2026-04-01 | 3/150 |
|
|---|---|---|---|---|
|
[考研] 343求調(diào)劑085601 +4 | 要努力學(xué)習(xí)x 2026-03-29 | 5/250 |
|
|
|
[考研] 一志愿北京科技大學(xué)085601材料工程英一數(shù)二初試總分335求調(diào)劑 +7 | 雙馬尾痞老板2 2026-04-01 | 7/350 |
|
|
|
[考研] 282求調(diào)劑 +17 | ycy1201 2026-04-01 | 19/950 |
|
|
|
[考研] 275求調(diào)劑 +12 | waltzh 2026-04-01 | 12/600 |
|
|
|
[考研] 292求調(diào)劑 +17 | 木蟲er12138 2026-04-01 | 17/850 |
|
|
|
[考研] 070300一志愿211，312分求調(diào)劑院校 +14 | 小黃鴨寶 2026-03-30 | 14/700 |
|
|
|
[考研] 【求調(diào)劑】085601材料工程專碩 | 總分272 | +10 | 腳滑的守法公民 2026-03-27 | 10/500 |
|
|
|
[考研] 一志愿中國科學(xué)院大學(xué)265求調(diào)劑 +8 | 恬淡ye 2026-03-31 | 9/450 |
|
|
|
[考研] 求調(diào)劑 +4 | DADA怪 2026-03-31 | 4/200 |
|
|
|
[考研] 安徽大學(xué)專碩生物與醫(yī)藥專業(yè)(086000)324分，英語已過四六級，六級521，求調(diào)劑 +10 | 美味可樂雞翅 2026-03-26 | 12/600 |
|
|
|
[考研] 合肥區(qū)域性重點(diǎn)一本招收調(diào)劑 +4 | 6266jl 2026-03-30 | 8/400 |
|
|
|
[考研] 322求調(diào)劑：一志愿湖南大學(xué) 材料與化工（085600），已過六級。 +10 | XX小鄧 2026-03-29 | 10/500 |
|
|
|
[考研] 一志愿浙江大學(xué)工科動力工程370,數(shù)一121,專業(yè)課135，現(xiàn)在能去哪里 +3 | 080700調(diào)劑 2026-03-30 | 4/200 |
|
|
|
[考研] 282求調(diào)劑 +3 | 呼吸都是減肥 2026-03-31 | 3/150 |
|
|
|
[考研] 調(diào)劑 +4 | GK72 2026-03-30 | 4/200 |
|
|
|
[考研]
 105500藥學(xué)求調(diào)劑，一志愿山東大學(xué)藥學(xué)，348分
+3
|
gr哈哈哈 2026-03-28 | 3/150 |
|
|
|
[考研] 291求調(diào)劑 +5 | Y-cap 2026-03-29 | 6/300 |
|
|
|
[考研] 265求調(diào)劑 +8 | 小木蟲085600 2026-03-27 | 8/400 |
|
|
|
[考研] 一志愿吉大071010，316分求調(diào)劑 +3 | xgbiknn 2026-03-27 | 3/150 |
|