ChemInform Abstract: New Synthesis of Multi-Substituted α-Chlorocyclobutanones from 1-Chloro-3-cyanoalkyl p-Tolyl Sulfoxides by 4-exo-dig Nucleophilic Ring Closure of Magnesium Carbenoids to Nitrile Group as the Key Reaction.

ChemInform ◽  
2012 ◽  
Vol 43 (38) ◽  
pp. no-no
Author(s):  
Hideki Saitoh ◽  
Taro Sampei ◽  
Tsutomu Kimura ◽  
Yuichi Kato ◽  
Naoyuki Ishida ◽  
...  
Keyword(s):  
Nitrile Group ◽  
Ring Closure ◽  
New Synthesis

ChemInform Abstract: New Synthesis of Alditol Thiaheterocycles via Ring Closure of Vicinal Bis-Cyclic Thionocarbonates of Alditols.

ChemInform ◽  
2010 ◽  
Vol 33 (19) ◽  
pp. no-no
Author(s):  
Sami Halila ◽  
Mohammed Benazza ◽  
Gilles Demailly
Keyword(s):  
Ring Closure ◽  
New Synthesis

New synthesis of .alpha.,.beta.-unsaturated .gamma.-butyrolactones involving .beta.-lactam-induced ring closure

1979 ◽  
Vol 44 (22) ◽  
pp. 3946-3948 ◽  
Author(s):  
Shinz Kano ◽  
Tsutomu Ebata ◽  
Kentaro Funaki ◽  
Shiroshi Shibuya
Keyword(s):  
Ring Closure ◽  
Beta Lactam ◽  
New Synthesis ◽  
Alpha Beta

A New Synthesis of Pyrazino[2,3-c]isoquinolines

1990 ◽  
Vol 43 (1) ◽  
pp. 179 ◽  
Author(s):  
MRM Bates ◽  
LW Deady ◽  
MF Mackay
Keyword(s):  
Crystal Structure ◽  
Ethyl Pyruvate ◽  
Ring Closure ◽  
Full Matrix ◽  
Space Group ◽  
Nucleophilic Displacement ◽  
New Synthesis ◽  
Convenient Synthesis ◽  
Displacement Reactions ◽  
Title System

A convenient synthesis of 1-(p-chlorophenoxy )isoquinoline-3,4-diame is described. Condensation with ethyl pyruvate gave entry to the tricyclic title system, and some further nucleophilic displacement reactions of substituent groups are described. The direction of ring closure in the tricycle formation was proved by determining the crystal structure of one of the derivatives; rhombohedral crystals of (3b) belong to the space group R3 with a 21.822(5)Ǻ, α 116.81(2)° and Z 12. Full-matrix refinement using 3093 reflections converged at R 0.085.

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