Intermolecular C–H Amidation of Alkenes with Carbon Monoxide and Azides via Tandem Palladium Catalysis
作者:Zheng-Yang Gu、Yang Wu、Xiaoguang Bao、Ji-Bao Xia、Feng Jin
DOI:10.1055/a-1401-4486
日期:2021.9
alkenes with carbonmonoxide and organic azides has been developed for the synthesis of alkenyl amides. The reaction proceeds efficiently without an ortho-directing group on the alkene substrates. Nontoxic dinitrogen is generated as the sole by-product. Computational studies and control experiments have revealed that the reaction takes place via an unexpected mechanism by tandem palladium catalysis.
Synthesis of double-conjugated-segment molecules and their application as ultra-broad two-photon-absorption optical limiters
作者:Junxiang Zhang、Yiping Cui、Mingliang Wang、Juzheng Liu
DOI:10.1039/b208190c
日期:2002.10.18
A series of novel double-conjugated-segment molecules, in which two conjugated segments are separated by an ether chain, were synthesized; these compounds provide a very broad two-photon absorption spectral range, which satisfies an urgent need in the optical limiting area.
The invention relates to novel pyrrolidine derivatives of formula (I):
wherein R
1
, R
2
and R
3
are as defined herein, as inhibitors of glutaminyl cyclase (QC, EC 2.3.2.5). QC catalyzes the intramolecular cyclization of N-terminal glutamine residues into pyroglutamic acid (5-oxo-prolyl, pGlu*) under liberation of ammonia and the intramolecular cyclization of N-terminal glutamate residues into pyroglutamic acid under liberation of water.
POLYMERIZATION ACCELERATOR, CURABLE COMPOSITION, CURED PRODUCT, AND PROCESS FOR PRODUCING THIOL COMPOUND
申请人:Miyata Hideo
公开号:US20100029876A1
公开(公告)日:2010-02-04
A polymerization accelerator includes a specific thiol compound. A curable composition of excellent thermal stability contains the polymerization accelerator. A cured product is obtained from the curable composition. The polymerization accelerator includes a thiol compound having two or more groups represented by Formula (1) below:
wherein R
1
is a hydrogen atom or a C1-10 alkyl group, and m is an integer of 0, 1 or 2.
Four-Component Reactions for the Synthesis of Perfluoroalkyl Isoxazoles
作者:Yuanjin Chen、Liangkui Li、Xiao He、Zhiping Li
DOI:10.1021/acscatal.9b03189
日期:2019.10.4
A four-component strategy for the synthesis of the isoxazole skeleton is developed. The approach achieves the synthesis of perfluoroalkyl isoxazoles by using simple perfluoroalkyl reagents. In addition, the unprecedented 3-azido-5-arylisoxazole formation demonstrates Togni’s reagent as a C-1 unit to be used in the isoxazole formation. The advantages of the method include readily available starting