N-alkenyl nitrone dipolar cycloaddition routes to piperidines and indolizidines. Part 3. Approach to the gephyrotoxin ring system

1992 ◽  
pp. 1089 ◽  
Author(s):  
Andrew B. Holmes ◽  
Andrew B. Hughes ◽  
Adrian L. Smith ◽  
Simon F. Williams
Keyword(s):  
Ring System ◽  
Dipolar Cycloaddition

ChemInform Abstract: N-Alkenyl Nitrone Dipolar Cycloaddition Routes to Piperidines and Indolizidines. Part 3. Approach to the Gephyrotoxin Ring System.

ChemInform ◽  
2010 ◽  
Vol 23 (33) ◽  
pp. no-no
Author(s):  
A. B. HOLMES ◽  
A. B. HUGHES ◽  
A. L. SMITH ◽  
S. F. WILLIAMS
Keyword(s):  
Ring System ◽  
Dipolar Cycloaddition

scholarly journals Novel chemistry of indole in the synthesis of heterocycles

2003 ◽  
Vol 75 (10) ◽  
pp. 1417-1432 ◽  
Author(s):  
G. W. Gribble
Keyword(s):  
Nucleophilic Addition ◽  
First Generation ◽  
Ring System ◽  
Diels Alder ◽  
Dipolar Cycloaddition ◽  
The Novel ◽  
New Methods ◽  
First Time

Indoles that are substituted at the 2- or 3-position with electron-withdrawing groups (nitro, phenylsulfonyl) undergo nucleophilic addition, 1,3-dipolar cycloaddition, and Diels–Alder reactions to give a variety of indoles, pyrroloindoles, and carbazoles. New methods for the synthesis of furo[3,4-b]indoles and the novel ring system furo[3,4-b]pyrrole are described for the first time. Diels–Alder reactions of furo[3,4-b]pyrroles afford indoles after dehydration of the primary cycloadducts. Efficient syntheses of both 2- and 3-nitroindoles from indole are reported, and the first generation and successful electrophilic trapping of a 2,3-dilithioindole has been achieved.

Synthesis of a novel heterocyclic ring system by way of highly regio- and chemoselective 1,3-dipolar cycloaddition of nitrilimines to 1,3,4-benzotriazepin-5-one derivatives

2002 ◽  
Vol 26 (11) ◽  
pp. 1545-1548 ◽  
Author(s):  
Rachid Jalal ◽  
Malika El Messaoudi ◽  
A??ssa Hasnaoui ◽  
M'hamed Esseffar ◽  
Mohamed Selkti ◽  
...  
Keyword(s):  
Heterocyclic Ring ◽  
Ring System ◽  
Dipolar Cycloaddition
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