A study of multiple ring expansion and ring contraction rearrangements in observable cycloalkyl cations

1978 ◽  
Vol 100 (16) ◽  
pp. 5134-5140 ◽  
Author(s):  
Roger P. Kirchen ◽  
Ted S. Sorensen ◽  
Kim E. Wagstaff
Keyword(s):  
Ring Expansion ◽  
Ring Contraction ◽  
Multiple Ring

Palladium-Catalyzed Ring-Contraction and Ring-Expansion Reactions of Cyclic Allyl Amines

2011 ◽  
Vol 50 (26) ◽  
pp. 5924-5926 ◽  
Author(s):  
Igor Dubovyk ◽  
Dmitry Pichugin ◽  
Andrei K. Yudin
Keyword(s):  
Ring Expansion ◽  
Ring Contraction ◽  
Palladium Catalyzed

Some Derivatives of 1-Benzazepine. Part II

1974 ◽  
Vol 52 (4) ◽  
pp. 610-615 ◽  
Author(s):  
G. R. Birchall ◽  
A. H. Rees
Keyword(s):  
Carboxylic Acids ◽  
Ring Expansion ◽  
Hydrazoic Acid ◽  
Ring Contraction ◽  
Effect Of Substituents ◽  
Ring Expansion Reaction ◽  
Derivatives Of

We have investigated the ring expansion of some substituted 1,4-naphthoquinones by hydrazoic acid to yield new 1-benzazepine derivatives of the "azatropolone" type. Ring contraction of those products, which are 2,5-dihydro-3-hydroxy-2,5-dioxo-1-benzazepines, gives 4-quinolone-2-carboxylic acids. Some of the reactions of the new benzazepine system were investigated. Attempts to prepare substituted derivatives suitable for making 1-benzazatrop-5-one were not successful.The effect of substituents on the ring expansion reaction is discussed and an anomalous ring expansion to a 2,5-dihydro-4-hydroxy-2,5-dioxo-1-benzazepine is described and explained mechanistically.

Macrocycles, 1. Macrocyclic polymerizations of (thio)lactones – stepwise ring expansion and ring contraction

1998 ◽  
Vol 199 (2) ◽  
pp. 273-282 ◽  
Author(s):  
Hans R. Kricheldorf ◽  
Soo-Ran Lee ◽  
Nicole Schittenhelm
Keyword(s):  
Ring Expansion ◽  
Ring Contraction

ChemInform Abstract: Ring Expansion and Ring Contraction Observed in Isopropenyldihydrofuran Derivatives.

ChemInform ◽  
2010 ◽  
Vol 29 (11) ◽  
pp. no-no
Author(s):  
S. YAMAGUCHI ◽  
Y. SUGIOKA ◽  
Y. KITAGAWA ◽  
Y. MATSUMOTO ◽  
H. YOKOYAMA ◽  
...  
Keyword(s):  
Ring Expansion ◽  
Ring Contraction
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