Ln(OTf)3- or Sc(OTf)3-Catalyzed Three Components Coupling Reactions between Aldehydes, Amines, and Dienes or Alkenes. Efficient Syntheses of Pyridine and Quinoline Derivatives

1995 ◽  
Vol 24 (6) ◽  
pp. 423-424 ◽  
Author(s):  
Shu Kobayashi ◽  
Haruro Ishitani ◽  
Satoshi Nagayama
Keyword(s):  
Quinoline Derivatives ◽  
Coupling Reactions ◽  
Three Components

Highly selective introduction of heteroatom groups to isocyanides and its application to electrocyclic reactions

2012 ◽  
Vol 85 (4) ◽  
pp. 785-799 ◽  
Author(s):  
Akiya Ogawa ◽  
Taichi Tamai ◽  
Takenori Mitamura ◽  
Akihiro Nomoto
Keyword(s):  
Cross Coupling ◽  
Molecular Iodine ◽  
Radical Cyclization ◽  
Sharp Contrast ◽  
Quinoline Derivatives ◽  
Coupling Reactions ◽  
Electrocyclic Reactions ◽  
Cross Coupling Reactions ◽  
Cyclization Process ◽  
Synthetic Intermediates

Photoinduced cyclization of o-alkenylaryl isocyanides with (PhS)2 in the presence of (PhTe)2 affords the corresponding bisthiolated indene derivatives in good yields via radical cyclization process by thio radical. The procedure can be applied to the construction of tetracyclic systems by using bis(o-aminophenyl) disulfides in place of (PhS)2. In sharp contrast, when o-alkynylaryl isocyanides are employed as the substrates, novel electrocyclic reactions take place upon photoirradiation or heating at 40~80 °C to generate quinoline 2,4-biradical species, which are trapped with organic diselenides, ditellurides, and molecular iodine to give the corresponding 2,4-diseleno-, ditelluro-, and diiodo-quinoline derivatives, respectively, in good yields. The obtained quinoline derivatives are useful synthetic intermediates; for example, cross-coupling reactions using 2,4-diiodoquinolines lead to the preparation of functionalized quinoline derivatives.

The Jovian ring

1984 ◽  
Vol 75 ◽  
pp. 203-209
Author(s):  
Joseph A. Burns
Keyword(s):  
Equatorial Plane ◽  
Charged Particles ◽  
Dynamical Evolution ◽  
Main Band ◽  
Small Grains ◽  
Three Components

ABSTRACTLying in Jupiter's equatorial plane is a diaphanous ring having little substructure within its three components (main band, faint disk, and halo). Micron-sized grains account for much of the visible ring, but particles of centimeter sizes and larger must also be present to absorb charged particles. Since dynamical evolution times and survival life times are quite short (≲102-3yr) for small grains, the Jovian ring is being continually replenished; probably most of the visible ring is generated by micrometeoroids colliding into unseen parent bodies that reside in the main band.

Substituted Amides of Quinoline Derivatives: Preparation and Their Photosynthesis-inhibiting Activity

2006 ◽  
Author(s):  
Robert Musiol ◽  
Josef Jampilek ◽  
Katarina Kralova ◽  
Dominik Tabak ◽  
Barbara Podeszwa ◽  
...  
Keyword(s):  
Inhibiting Activity ◽  
Quinoline Derivatives
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