Transformations of chiral (.eta.6-arene)chromium complexes in organic synthesis: diastereoselective 1,4-addition reactions of organocopper reagents to (ortho-substituted-phenyl (E)-enone)chromium complexes

1992 ◽  
Vol 11 (11) ◽  
pp. 3705-3712 ◽  
Author(s):  
Motokazu Uemura ◽  
Hirofumu Oda ◽  
Tatsuya Minami ◽  
Motoo Shiro ◽  
Yuji Hayashi
Keyword(s):  
Organic Synthesis ◽  
Addition Reactions ◽  
Chromium Complexes

7 Electrochemically Generated Nitrogen-Centered Radicals

2022 ◽  
Author(s):  
Z.-W. Hou ◽  
H.-C. Xu
Keyword(s):  
Hydrogen Atom ◽  
Organic Synthesis ◽  
Recent Progress ◽  
Reactive Intermediates ◽  
Hydrogen Atom Abstraction ◽  
Addition Reactions ◽  
Electrochemical Generation ◽  
Nitrogen Containing Compounds

Nitrogen-centered radicals are versatile reactive intermediates for organic synthesis. This chapter describes recent progress in the electrochemical generation and reactions of nitrogen-centered radicals. Under electrochemical conditions, various nitrogen-centered radicals are generated through electrolysis of readily available precursors such as N—H bonds or azides. These reactive intermediates undergo addition reactions to π-systems or hydrogen-atom abstraction to generate various nitrogen-containing compounds.

ChemInform Abstract: (η6-Arene)chromium Complexes in Organic Synthesis: Synthesis of (.+ -.)-Dihydroxyserrulatic Acid.

ChemInform ◽  
2010 ◽  
Vol 22 (43) ◽  
pp. no-no
Author(s):  
M. UEMURA ◽  
H. NISHIMURA ◽  
T. MINAMI ◽  
Y. HAYASHI
Keyword(s):  
Organic Synthesis ◽  
Chromium Complexes

Lithiated oxazolinyloxiranes and oxazolinylaziridines: key players in organic synthesis

2014 ◽  
Vol 86 (6) ◽  
pp. 913-924 ◽  
Author(s):  
Saverio Florio ◽  
Leonardo Degennaro ◽  
Rosmara Mansueto ◽  
Biagia Musio ◽  
Filippo M. Perna ◽  
...  
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Organic Synthesis ◽  
Spectroscopic Data ◽  
Chemical Properties ◽  
Structural Features ◽  
Addition Reactions ◽  
Electronic Effects ◽  
Key Players ◽  
Ir Spectroscopic

AbstractThis paper focuses on α-lithiated oxazolinyloxiranes and oxazolinylaziridines, their generation, reactions, and synthetic applications. The ability of the oxazoline ring in providing stabilization to such α-heterosubstituted carbanions either through electronic effects and coordinative action has been stressed as well as the contribution to the configurational stability or instability of such species. IR spectroscopic data, multinuclear NMR investigations, and ab initio calculations planned to get insights on chemical properties and structural features have been carried out. A number of new reactions including alkylations, addition reactions, hydroxyalkylations, cyclopropanations, lactonizations, and rearrangements have been discovered, giving access to a variety of substances including: aziridinolactones, epoxylactones, aryl alkanones, polysubstituted cyclopropanes, cyclopropanefused lactones, dihydro-oxazoloisoquinolines, diversely functionalized oxazolines, and products that can be derived from them by synthetic elaboration.

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