A novel route to synthesize libraries of quinoxalines via Petasis methodology in two synthetic operations
摘要:
This Letter reveals an innovative and facile procedure to prepare quinoxalines in two synthetic steps. The microwave assisted Petasis reaction is followed by the acid mediated unmasking of an internal amino nucleophile, cyclodehydration and oxidation to give collections of quinoxalines in good to excellent yields. (C) 2011 Elsevier Ltd. All rights reserved.
The CC double bondcleavage of enaminones has been realized under ambient conditions through visible‐light catalysis in the presence of Rose Bengal, which leads to the synthesis of a class of 1,2‐diketones without using any metal catalyst. In addition, the one‐pot synthesis of quinoxalines has also been achieved under identical photocatalytic conditions by making use of the in situ generated 1,2‐diketones
Light-emitting element, light-emitting device, electronic device, and quinoxaline derivative
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:EP2573075A1
公开(公告)日:2013-03-27
The present invention provides quinoxaline derivatives having an electron-trapping property and light-emitting elements, light-emitting devices and electronic devices comprising the same. The light-emitting element according to the present invention comprises a quinoxaline derivative as an organic compound. Advantageously, the present invention provides light-emitting elements having long lifetime, and light-emitting devices and electronic devices having long lifetime.
POROUS CYCLODEXTRIN POLYMERIC MATERIALS AND METHODS OF MAKING AND USING SAME
申请人:Cornell University
公开号:US20170173560A1
公开(公告)日:2017-06-22
A nucleophilic substitution reaction to crosslink cyclodextrin (CD) polymer with rigid aromatic groups, providing a high surface area, mesoporous CD-containing polymers (P-CDPs). The P-CDPs can be used for removing organic contaminants from water. By encapsulating pollutants to form well-defined host-guest complexes with complementary selectivities to activated carbon (AC) sorbents. The P-CDPs can rapidly sequester pharmaceuticals, pesticides, and other organic micropollutants, achieving equilibrium binding capacity in seconds with adsorption rate constants 15-200 times greater than ACs and nonporous CD sorbents. The CD polymer can be regenerated several times, through a room temperature washing procedure, with no loss in performance.