Synthesis of N-heterocyclic compounds via ene–yne metathesis reactions
摘要:
Propargylamino and allylamino derivatives of cyclohexene and norbornene were subjected to tandem metathesis reactions with first and second generation Grubbs' catalysts 1 and 2. Results show that the method is compatible with suitably protected nitrogen-containing compounds. Cyclohexenes gave intriguing results in terms of the possibility to perform ring rearrangement metathesis (RRM) reactions, showing a difference with the analogous allyl and propargyl ether substrates. (c) 2007 Elsevier Ltd. All rights reserved.
properties that make them bulky but accessible. In this study, we synthesized a novel type of NHC ligand that possesses a bicyclo[2.2.1]heptane architecture, and we compared five derivatives using copper-catalyzed allylic arylations with aryl Grignard reagents. The regioselectivity of the substitution obviously indicates that a phenyl ring over an active site has a characteristic effect on the resultant
ORGANOMETALLIC COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
申请人:Samsung Display Co., Ltd.
公开号:US20210399241A1
公开(公告)日:2021-12-23
An organometallic compound represented by Formula 1 and an organic light-emitting device including the same. The substituents of Formula 1 are the same as described in the specification.
A retro-Diels-Alder approach to oxazoles and imidazoles
作者:Michael A. Eissenstat、John D. Weaver
DOI:10.1021/jo00064a029
日期:1993.6
Heating N-acyl derivatives 4 of 3-endo-aminobicyclo[2.2.1]hept-5-en-2-endo-ol (3) at 185-195-degrees-C for 4-5 h provides oxazoles 1a-e in 49-88 % yields. The reaction proceeds via initial dehydration to an oxazoline which undergoes retro-Diels-Alder reaction to provide the oxazole. Similarly, imidazoles 7a-f may be obtained in 40-79 % yields by heating imidazolines 6a-f to effect the cycloreversion.
Synthesis of Norbornahemicucurbiturils
作者:Vladimir Sindelar、Tomas Fiala
DOI:10.1055/s-0033-1339850
日期:——
Ethyleneurea fused with a norbornane ring was prepared. Acid-catalyzed polycondensation of the urea with paraformaldehyde yielded a new six-membered hemicucurbituril derivative. The presence of hemicucurbiturils containing from four to eight monomer units were also detected.
Eissenstat Michael A., Weaver John D. (III), J. Org. Chem., 58 (1993) N 12, S 3387-3390