24小时热门版块排行榜    

Znn3bq.jpeg
汕头大学海洋科学接受调剂
查看: 707  |  回复: 3

lisz201201

银虫 (小有名气)

[求助] 求助酰肼合成

请教大神,肉桂酸甲酯怎么制得肉桂酸酰肼。直接和水合肼肼解?双键有什么影响。
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

tangfh1973

铁杆木虫 (著名写手)

【答案】应助回帖


493070060: 金币+1, 鼓励交流,欢迎常来精化版! 2013-07-30 16:14:23
zhoupeng87: 应助指数+1 2013-07-31 07:56:48
To warm (50 °C) solution of 5.66 g (0.10 mol) KOH in 50 mL of water, 15 g (0.10 mol) cinnamic acid 1 was added and the mixture was stirred for 5 min. The resulting slurry was evaporated on the rotary evaporator and dried in vacuum. The crude potassium cinnamate (18.6 g) was introduced into 500 mL of CH2Cl2, cooled down to 0 °C and 10.8 g (0.10 mol) of ethyl chloroformate and 20 mL of a 1percent solution of pyridine in CH2Cl2 were added dropwise. The mixture was stirred for 2 h at 0 °C and then poured into a suspension of 5 mL of 98 percent hydrazine hydrate (0.10 mol) in 70 mL of CH2Cl2 and stirred again for 12 h at 0 °C. The white precipitate was removed by filtration, the filtrate was dried over MgSO4 and then concentrated under reduced pressure. The crude product was crystallised from benzene to give pure hydrazide 2. Cinnamic acid hydrazide (2). White solid (73percent); mp 115-116 C (lit.7: mp 117-117.5 C); Rf (benzene/AcOEt, 1:5 v/v) 0.13. 1H NMR (300 MHz, DMSO-d6): 4.48 (2H, s, NHNH2), 6.55 (1H, d, J 15.6 Hz, -CH=CH-CO), 7.35-7.40 (3H, m, Ph: H3, H4, H5), 7.44 (1H, d, J 15.6 Hz, -CH=CH-CO), 7.53-7.56 (2H, m, Ph: H2, H6), 9.36 (1H, s, NHNH2). 13C NMR (DMSO-d6): 120.3 (CH=CH-CO), 127.4, 128.9, 129.4, 134.9 (Ph), 138.1 (CH=CH-CO), 164.5 (CO).甲酯与乙酯的工艺应该相似
人生,幸福不是目的,美德才是准绳
2楼2013-07-30 15:11:09
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

R2BBr

木虫 (知名作家)


【答案】应助回帖

One-pot Synthesis of Cinnamoyl Hydrazides
RCH=CHCO2H + Bt-Ms --> RCH=CH-COBt (-MsOH) + N2H4 --> RCH=CH=CONHNH2 + BtH

» 本帖附件资源列表

  • 欢迎监督和反馈:小木虫仅提供交流平台,不对该内容负责。
    本内容由用户自主发布,如果其内容涉及到知识产权问题,其责任在于用户本人,如对版权有异议,请联系邮箱:xiaomuchong@tal.com
  • 附件 1 : One-potSynthesisofCinnamoylHydrazides.pdf
  • 2013-08-01 01:28:07, 92.57 K
3楼2013-08-01 01:28:25
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

R2BBr

木虫 (知名作家)


【答案】应助回帖

Synthesis and Characterization of Some Oxadiazoles and Thiadiazoles Derivatives

RCO2Me + N2H4  --reflux-->  RCO2NHNH2 + MeOH

» 本帖附件资源列表

4楼2013-08-01 01:36:01
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 lisz201201 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 化工学硕294分,求导师收留 +26 yzyzx 2026-04-12 29/1450 2026-04-14 01:48 by BruceLiu320
[考研] 332求调剂 +15 蕉蕉123 2026-04-10 15/750 2026-04-13 23:12 by pies112
[考研] 调剂 +27 不逢春 2026-04-07 28/1400 2026-04-13 20:19 by xxy88888
[考研] 一志愿华中农微生物,288分,三年实验经历 +11 代fish 2026-04-09 11/550 2026-04-12 10:21 by Hayaay
[考研] 326求调剂 +6 Shansyn 2026-04-10 6/300 2026-04-12 09:46 by hammer3
[考研] 307求调剂 +10 tzq94092 2026-04-10 10/500 2026-04-12 08:18 by wise999
[找工作] 山东高校教师考核超级无底线,员工过不下去啦 +4 qut2026 2026-04-09 9/450 2026-04-12 00:54 by qut2026
[考研] 277 数一104,学硕,求调剂 +21 瓶子PZ 2026-04-09 23/1150 2026-04-11 23:12 by labixiaoqiao
[考研] 283求调剂 +22 那个噜子 2026-04-09 22/1100 2026-04-11 10:41 by 逆水乘风
[考研] 0854调剂 +4 长弓傲 2026-04-09 4/200 2026-04-11 09:18 by 猪会飞
[考研] 337求调剂 +4 研s. 2026-04-10 4/200 2026-04-11 08:57 by zhq0425
[考研] 342电子信息专硕求调剂 +9 你让我怎么荔枝 2026-04-10 10/500 2026-04-11 08:33 by zhq0425
[考研] 调剂 +12 卷卷卷心菜_ 2026-04-09 13/650 2026-04-10 22:36 by Ftglcn90
[考研] 一志愿华东师范生物学326分,求调剂 +8 刘墨墨 2026-04-09 8/400 2026-04-10 12:00 by pengliang8036
[考研] 292求调剂 +9 笑笑袁 2026-04-09 9/450 2026-04-10 10:05 by LHGeng
[考研] 一志愿中科大070300化学,314分求调剂 +12 wakeluofu 2026-04-09 12/600 2026-04-10 09:57 by liuhuiying09
[考研] 材料专硕调剂 +16 哈哈哈吼吼吼哈 2026-04-07 17/850 2026-04-09 21:16 by wutongshun
[考研] 070300化学 求调剂 +13 73372112 2026-04-08 13/650 2026-04-09 20:22 by maddjdld
[考研] 计算机11408 287 求调剂 +3 LiLe5 2026-04-07 3/150 2026-04-07 23:15 by shanqishi
[考研] 11408 325分 +3 jgtxuxgkx 2026-04-07 3/150 2026-04-07 23:10 by lbsjt
信息提示
请填处理意见