ChemInform Abstract: The Chemistry of Pyrrolic Compounds. Part 63. Synthetic Studies of Petroporphyrins with Fused Six-Membered Ring Systems.

ChemInform ◽  
1990 ◽  
Vol 21 (36) ◽  
Author(s):  
P. S. CLEZY ◽  
J. K. PRASHAR
Keyword(s):  
Membered Ring ◽  
Ring Systems ◽  
Synthetic Studies

The Chemistry of Pyrrolic Compounds. LXIII. Synthetic Studies of Petroporphyrins With Fused Six-Membered Ring Systems

1990 ◽  
Vol 43 (5) ◽  
pp. 825 ◽  
Author(s):  
PS Clezy ◽  
JK Prashar
Keyword(s):  
Intramolecular Cyclization ◽  
Membered Ring ◽  
Stannic Chloride ◽  
Side Chain ◽  
Ring Systems ◽  
Synthetic Studies

Several approaches to the synthesis of porphyrins bearing fused six- membered ring systems were explored with the aim of obtaining the petroporphyrin (4a). This was ultimately achieved by an intramolecular cyclization of a porphyrin with a propanoyl chloride side chain in the presence of stannic chloride. Methylation of the intermediate ketone with CH3Li and reduction of the resultant alcohol with NaBH3CN/Znl2 furnished (4a).

ChemInform Abstract: Five-Membered Ring Systems: Thiophenes and Se/Te Analogues

ChemInform ◽  
2009 ◽  
Vol 40 (23) ◽  
Author(s):  
Tomasz Janosik ◽  
Jan Bergman
Keyword(s):  
Membered Ring ◽  
Ring Systems

ChemInform Abstract: Three-Membered Ring Systems

ChemInform ◽  
2010 ◽  
Vol 24 (51) ◽  
pp. no-no
Author(s):  
A. PADWA ◽  
S. S. MURPHREE
Keyword(s):  
Membered Ring ◽  
Ring Systems

ChemInform Abstract: Five-Membered Ring Systems: Furans and Benzofurans

ChemInform ◽  
2014 ◽  
Vol 45 (31) ◽  
pp. no-no
Author(s):  
Kap-Sun Yeung ◽  
Xiao-Shui Peng ◽  
Jie Wu ◽  
Renhua Fan ◽  
Xue-Long Hou
Keyword(s):  
Membered Ring ◽  
Ring Systems

Pseudo-Jahn−Teller Distortion from Planarity in Heterocyclic Seven- and Eight-Membered Ring Systems with Eight π Electrons

2003 ◽  
Vol 107 (15) ◽  
pp. 2749-2756 ◽  
Author(s):  
Azumao Toyota ◽  
Shiro Koseki ◽  
Hiroaki Umeda ◽  
Mika Suzuki ◽  
Kazuyoshi Fujimoto
Keyword(s):  
Membered Ring ◽  
Teller Distortion ◽  
Ring Systems ◽  
Jahn Teller ◽  
Jahn Teller Distortion
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