一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

ChemicalBook >> journal list >> ChemistrySelect >>article
ChemistrySelect

ChemistrySelect

IF: 1.9
Download PDF

Triflic Anhydride (Tf2O): An Efficient Catalyst for Electrophilic Activation of Amides

Published:7 June 2021 DOI: 10.1002/slct.202100305
Zahra Tashrifi, Mohammad Mohammadi-Khanaposhtani, Bagher Larijani, Mohammad Mahdavi

Abstract

Tf2O (trifluoromethanesulfonic anhydride) as an electrophilic reagent has been increasingly?attracting the attention of researchers over the last decade due to its capability in synthesizing a variety of N-heterocycles through activation of amides. This activation is associated with the formation of intermediates such as enolonium, imino/iminium, nitrilium and keteniminium triflate ions and isocyanate species which can lead to the synthesis of different types of N-heterocycles depending on the nature of the intermediates. In this review, we have summarized and classified the?latest?research in this area (from 2012 on) based on the type of intermediates produced from the triflic anhydride-catalyzed activation of amides. The findings are classified into five main categories, namely enolonium, imino/iminium, nitrilium and keteniminium intermediates ions and isocyanate species.

Substances (3)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Trifluoromethanesulfonic acid 1493-13-6 CHF3O3S 798 suppliers $12.00-$6738.15
Trifluoromethanesulfonic anhydride 358-23-6 C2F6O5S2 764 suppliers $7.62-$6920.07
ISOCYANATE CNO- 1 suppliers Inquiry

Similar articles

IF:2.2

Efficient synthesis of piperazinyl amides of 18β-glycyrrhetinic acid.

Beilstein Journal of Organic Chemistry Dong Cai, ZhiHua Zhang,etc Published: 21 April 2020
IF:4.3

Sodium methoxide: a simple but highly efficient catalyst for the direct amidation of esters?

Chemical Communications Takashi Ohshima, Yukiko Hayashi,etc Published: 12 April 2012
炉霍县| 陈巴尔虎旗| 天津市| 西乌| 务川| 柏乡县| 屏南县| 四子王旗| 九寨沟县| 武宣县| 昌吉市| 英德市| 普安县| 潢川县| 徐水县| 卫辉市| 中西区| 瑞昌市| 夹江县| 邯郸县| 上栗县| 赣榆县| 西华县| 黄陵县| 南岸区| 隆德县| 北宁市| 灵寿县| 尼勒克县| 梁山县| 岳池县| 青岛市| 澳门| 桂阳县| 怀化市| 承德县| 普陀区| 游戏| 二连浩特市| 湖州市| 濮阳县|