私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關(guān)鏈接
聯(lián)系方式
  • 通信地址:杭州市 浙江大學(xué)玉泉校區(qū)高分子大樓421房間
  • 郵編:310027
  • 電話:0571-87953732
  • 傳真:0571-87953732
  • Email:xhzhang@zju.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Organocatalytic Regioselective Synthesis of Sulfur-Containing N-Alkyl Carbamates from Alkyne-Derived Cyclic Carbonates
作者:Bin Liu and Xinghong Zhang
關(guān)鍵字:sulfur-containing N-alkyl carbamate,Alkyne-Derived Cyclic Carbonates
論文來源:期刊
具體來源:Gen. Chem. 2018, 4, 180007.
發(fā)表時間:2018年

A highly regioselective synthesis of sulfur-containing N-alkyl carbamate from propargyl alcohol, carbon dioxide (CO2) and amine via metal-free catalysis is described. The regioselective ring-opening addition of tri-substituted cyclic carbonate with amine was investigated in detail. A key feature of this system is the ability to afford tertiary β-hydroxyl N-alkyl carbamate with 100% selectivity by using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as the catalyst in a wide range of reaction temperatures. The steric hindrance of amine and the use of ethanol favored the regioselective ring-opening addition reaction. A proposed mechanism for the ring-opening

addition elaborated the underlying reason for the regioselective synthesis of sulfur-containing N-alkyl carbamate. This study provides a new alternative synthetic route to sulfur-containing N-alkyl carbamates from alkyne and CO2 and may offer an attractive scaffold for further synthesis.


主站蜘蛛池模板: 古田县| 邓州市| 内乡县| 攀枝花市| 太白县| 鹿泉市| 沙洋县| 昭平县| 淳化县| 双流县| 龙门县| 平远县| 永康市| 绥棱县| 板桥市| 桂平市| 固始县| 清苑县| 湟源县| 崇左市| 桐庐县| 新晃| 云南省| 浦北县| 密山市| 贡山| 垫江县| 潍坊市| 岚皋县| 全州县| 福鼎市| 景宁| 长寿区| 宣城市| 镇安县| 宁海县| 五指山市| 东光县| 武冈市| 尖扎县| 屏南县|