Interplay of Cascade Oxidative Cyclization and Hydride Shifts in the Synthesis of the ABC Spiroketal Ring System of Pectenotoxin-4

2013 ◽  
Vol 125 (9) ◽  
pp. 2551-2554 ◽  
Author(s):  
Timothy J. Donohoe ◽  
Radosław M. Lipiński
Keyword(s):  
Ring System ◽  
Oxidative Cyclization

The chemistry of pyrrolic compounds. LVII. The oxidative cyclization of derivatives of 1,19-dideoxybilenes-b

1984 ◽  
Vol 37 (10) ◽  
pp. 2085 ◽  
Author(s):  
PS Clezy ◽  
Lv Thuc
Keyword(s):  
Carbon Atom ◽  
Basic Mechanism ◽  
Ring System ◽  
Oxidative Cyclization ◽  
The Other ◽  
Terminal Position ◽  
Methyl Group ◽  
Derivatives Of

A study of the oxidative cyclization of 13C-labelled bilenes-b substituted with a methyl group at one terminal position and a formyl equivalent at the other, e.g. (1), has clearly established that the methyl group provides the carbon atom to complete the ring system. The basic mechanism of this reaction is discussed.

A novel ring system arising from intramolecular oxidative cyclization of 8-(4-pentenyl)dihydroberberine

1989 ◽  
Vol 30 (51) ◽  
pp. 7161-7164 ◽  
Author(s):  
Mark Cushman ◽  
Donald A. Patrick ◽  
Pascal H. Toma ◽  
Stephen R. Byrn
Keyword(s):  
Ring System ◽  
Oxidative Cyclization ◽  
Intramolecular Oxidative Cyclization

Stochasting modeling of planetary ring systems

1984 ◽  
Vol 75 ◽  
pp. 461-469 ◽  
Author(s):  
Robert W. Hart
Keyword(s):  
Maximum Entropy ◽  
Ring System ◽  
The Sun ◽  
Ultimate State ◽  
Interparticle Interactions ◽  
Ring Systems ◽  
First Order ◽  
Planetary Ring ◽  
Insight Into

ABSTRACTThis paper models maximum entropy configurations of idealized gravitational ring systems. Such configurations are of interest because systems generally evolve toward an ultimate state of maximum randomness. For simplicity, attention is confined to ultimate states for which interparticle interactions are no longer of first order importance. The planets, in their orbits about the sun, are one example of such a ring system. The extent to which the present approximation yields insight into ring systems such as Saturn's is explored briefly.

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