General C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cross-Electrophile Coupling Reactions Enabled by Overcharge Protection of Homogeneous Electrocatalysts
作者:Blaise L. Truesdell、Taylor B. Hamby、Christo S. Sevov
DOI:10.1021/jacs.0c01475
日期:2020.3.25
development of an electrochemical methodology for XEC that utilizes redox-active shuttles developed by the energy-storage community to protect reactive coupling catalysts from overreduction. The resulting electrocatalytic system is practical, scalable, and broadly applicable to the reductive coupling of a wide range of aryl, heteroaryl, or vinylbromides with primary or secondary alkyl bromides. The impact
Substituted benzoylpiperidine derivatives and their use as Neurokinin antagonists
申请人:PFIZER INC.
公开号:EP0992493A1
公开(公告)日:2000-04-12
The present invention provides a compound of the formula:-
or a pharmaceutically acceptable acid addition salt thereof,
wherein
Ar is phenyl substituted by 1 or 2 substituent(s) each independently selected from fluoro and chloro;
X is NSO2(C1-C4 alkyl), NSO2(halo(C1-C4 alkyl)) or O;
m is 0 or 1 ;
n is 1 or 2;
p is 1 or 2;
q is 1 or 2; and
r is 1 or 2, together with processes for the preparation of, intermediates used in the preparation of, compositions containing and uses of, such derivatives. The compounds have tachykinin receptor antagonist activity.
Functionalization of Pyridinium Derivatives with 1,4-Dihydropyridines Enabled by Photoinduced Charge Transfer
作者:Inwon Kim、Seongjin Park、Sungwoo Hong
DOI:10.1021/acs.orglett.0c03347
日期:2020.11.6
By exploiting electron donor–acceptor (EDA) complexes between 1,4-dihydropyridines and N-amidopyridinium salts under visible light irradiation, we discovered that photoinduced intermolecular charge transfer induces a single-electrontransfer event without requiring a photocatalyst for the facile functionalization of pyridines. The generality of this method is amenable to various types of 1,4-dihydropyridines
Pyridyl-tetrahydropyrans and process for preparing same
申请人:Imperial Chemical Industries Limited
公开号:US04048180A1
公开(公告)日:1977-09-13
The present invention deals with intermediate compounds, namely 4-(2'-, 3'- and 4'-pyridyl)-tetrahydropyrans and a process for their preparation. These compounds are prepared by reacting a 2'-haloethyl-3-(pyridyl)propyl ether with an alkali metal amide at -80.degree. C. to 40.degree. C.
Silyl Radical Activation of Alkyl Halides in Metallaphotoredox Catalysis: A Unique Pathway for Cross-Electrophile Coupling
作者:Patricia Zhang、Chi “Chip” Le、David W. C. MacMillan
DOI:10.1021/jacs.6b04818
日期:2016.7.6
merger of photoredox and transition metal catalysis. In this report, we demonstrate the use of commercially available tris(trimethylsilyl)silane with metallaphotoredox catalysis to efficiently couple alkyl bromides with aryl or heteroaryl bromides in excellent yields. We hypothesize that a photocatalytically generated silyl radical species can perform halogen-atom abstraction to activate alkyl halides