Reaction of 2-alkylamino-1-azaazulenes with N-phenylbenzylideneamine N-oxide; one pot synthesis of the 12H-11,12,13-triazaazuleno[2,1-b ]fluorene ring system

1997 ◽  
pp. 993-996 ◽  
Author(s):  
Noritaka Abe ◽  
Haruhiko Matsuda ◽  
Yoshikazu Sugihara ◽  
Akikazu Kakehi
Keyword(s):  
Ring System ◽  
One Pot ◽  
One Pot Synthesis

One-pot synthesis of precocene I and II and a formal synthesis of robustadial A and B via 2-phenyl-4H-1,3,2-benzodioxaborin

1994 ◽  
Vol 72 (8) ◽  
pp. 1866-1869 ◽  
Author(s):  
Suzanne Bissada ◽  
Cheuk K. Lau ◽  
Michael A. Bernstein ◽  
Claude Dufresne
Keyword(s):  
Phenylboronic Acid ◽  
Ring System ◽  
Unsaturated Aldehyde ◽  
One Pot ◽  
Formal Synthesis ◽  
One Pot Synthesis ◽  
Chromene Ring

The reaction of a phenol, and α,β-unsaturated aldehyde, and phenylboronic acid yields a 2-phenyl-4H-1,3,2-benzodioxaborin. Upon heating, this compound decomposes to an orthoquinone-methide intermediate, which undergoes an electrocyclization reaction to a chromene ring system. This method has been applied to the synthesis of precocenes I and II and the robustadial A and B.

Stereospecific one-pot synthesis of a new 6,11-dioxa-7-aza--homosteroid ring system

1986 ◽  
Vol 27 (22) ◽  
pp. 2517-2518 ◽  
Author(s):  
Ferenc Fülöp ◽  
Gábor Bernáth ◽  
István Pelczer
Keyword(s):  
Ring System ◽  
One Pot ◽  
One Pot Synthesis

Studies Directed toward the Synthesis of Martinellines : One Pot Synthesis of Pyrroloquinolone Ring System

Heterocycles ◽  
1997 ◽  
Vol 45 (2) ◽  
pp. 231 ◽  
Author(s):  
Mukund K. Gurjar ◽  
Shashwati Pal ◽  
A. V. Rama Rao
Keyword(s):  
Ring System ◽  
One Pot ◽  
One Pot Synthesis

scholarly journals Manganese dioxide mediated one-pot synthesis of methyl 9H-pyrido[3,4-b]indole-1-carboxylate: Concise synthesis of alangiobussinine

2011 ◽  
Vol 7 ◽  
pp. 1407-1411 ◽  
Author(s):  
Jessica Baiget ◽  
Sabin Llona-Minguez ◽  
Stuart Lang ◽  
Simon P MacKay ◽  
Colin J Suckling ◽  
...  
Keyword(s):  
Manganese Dioxide ◽  
Alcohol Oxidation ◽  
Ring System ◽  
One Pot ◽  
One Pot Synthesis ◽  
Synthetic Routes ◽  
Heterocyclic Moiety

The carboline ring system is an important pharmacophore found in a number of biologically important targets. Development of synthetic routes for the preparation of these compounds is important in order to prepare a range of analogues containing the carboline heterocyclic moiety. A manganese dioxide mediated one-pot method starting with an activated alcohol and consisting of alcohol oxidation, Pictet–Spengler cyclisation, and oxidative aromatisation, offers a convenient process that allows access to β-carbolines. This one-pot process for the preparation of methyl 9H-pyrido[3,4-b]indole-1-carboxylate has subsequently been used as the key step in the synthesis of alangiobussinine and a closely related analogue.

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