High-temperature continuous flow synthesis of 1,3,4-oxadiazoles via N-acylation of 5-substituted tetrazoles
作者:Benedikt Reichart、C. Oliver Kappe
DOI:10.1016/j.tetlet.2011.12.043
日期:2012.2
Applying continuous flow processing in a high-temperature/high-pressure regime (200-220 degrees C, 11-14 bar) 2,5-disubstituted-1,3,4-oxadiazoles are prepared in high yields within 5-10 min residence time by treatment of 5-substituted-1H-tetrazoles with anhydrides or acid chlorides as electrophiles (Huisgen reaction). (C) 2011 Elsevier Ltd. All rights reserved.
m-TERPHENYL COMPOUND DERIVATIVES AND APPLICATION FOR ORGANIC LIGHT EMITTING DIODE
申请人:CHENG Chien-Hong
公开号:US20110220880A1
公开(公告)日:2011-09-15
An m-terphenyl derivative has a structure of formula (I) or (II):
wherein A and B are five-membered heterocyclic compounds containing nitrogen, each of substituents R, R
1
and R
2
is a member independently selected from the group consisting of H, halo, cyano, trifluoromethyl, amino, C
1
-C
10
alkyl, C
2
-C
10
alkenyl, C
2
-C
10
alkynyl, C
3
-C
20
cycloalkyl, C
3
-C
20
cycloalkenyl, C
1
-C
20
heterocycloalkyl, C
1
-C
20
heterocycloalkenyl, aryl and heteroaryl. The compound of the present invention may have advantages in good electron affinity, low HOMO and thereby achieving hole blocking and may be used for electron transport material and/or electron injection material.
US8475939B2
申请人:——
公开号:US8475939B2
公开(公告)日:2013-07-02
Iron(III)/TEMPO-Catalyzed Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazoles by Oxidative Cyclization under Mild Conditions
A simple and efficient cationic Fe(III)/TEMPO-catalyzed oxidative cyclization of aroyl hydrazones has been developed for the synthesis of 2,5-disubstituted 1,3,4-oxadiazole derivatives. The reaction offers a broad scope, good functional-group tolerance, and high yields under mild conditions in the presence of O2.