Facile synthesis of 6-cyano-9-substituted-9H-purines and their ring expansion to 8-(arylamino)-4-imino-3-methylpyrimidino[5,4-d]pyrimidines

2001 ◽  
pp. 2532-2537 ◽  
Author(s):  
Amal Al-Azmi ◽  
Brian L. Booth ◽  
Robert A. Carpenter ◽  
Alice Carvalho ◽  
Elodie Marrelec ◽  
...  
Keyword(s):  
Ring Expansion ◽  
Facile Synthesis

Facile Synthesis of Polysubstituted 2-Pyrones via TfOH-Mediated Ring Expansion of 2-Acylcyclopropane-1-carboxylates

Synthesis ◽  
2021 ◽  
Vol 53 (21) ◽  
pp. e5-e5
Author(s):  
Sunewang R. Wang ◽  
Jiru Shao ◽  
Caiyun An
Keyword(s):  
Ring Expansion ◽  
Facile Synthesis

ChemInform Abstract: Ring Expansion of 3-Oxetanone-Derived Spirocycles: Facile Synthesis of Saturated Nitrogen Heterocycles.

ChemInform ◽  
2014 ◽  
Vol 45 (14) ◽  
pp. no-no
Author(s):  
Stefan A. Ruider ◽  
Steffen Mueller ◽  
Erick M. Carreira
Keyword(s):  
Nitrogen Heterocycles ◽  
Ring Expansion ◽  
Facile Synthesis

Ring expansion of halo dithiolanes and dithianes: a facile synthesis of medium-ring dithiacycloalkenes

1992 ◽  
Vol 57 (24) ◽  
pp. 6658-6662 ◽  
Author(s):  
Zhihua Sui ◽  
Paul S. Furth ◽  
James J. De Voss
Keyword(s):  
Ring Expansion ◽  
Facile Synthesis ◽  
Medium Ring

Facile Synthesis of Polysubstituted 2-Pyrones via TfOH-Mediated Ring Expansion of 2-Acylcyclopropane-1-Carboxylates

Synthesis ◽  
2021 ◽  
Author(s):  
Jiru Shao ◽  
Caiyun An ◽  
Sunewang Rixin Wang
Keyword(s):  
Cyclopropane Ring ◽  
Bond Cleavage ◽  
Ring Expansion ◽  
Facile Synthesis ◽  
Aryl Group ◽  
Pyrone Ring ◽  
Donor Acceptor ◽  
Facile Route

A facile route to polysubstituted 2-pyrones from readily available 2-acylcyclopropane-1-aryl-1-carboxylates mediated by TfOH is reported. The strongly donating 1-aryl group is important for directing the C-C bond cleavage of the donor-acceptor cyclopropane ring, which then leads to the formation of the 2-pyrone ring through lactonization.

Ring Expansion of 3-Oxetanone-Derived Spirocycles: Facile Synthesis of Saturated Nitrogen Heterocycles

2013 ◽  
Vol 52 (45) ◽  
pp. 11908-11911 ◽  
Author(s):  
Stefan A. Ruider ◽  
Steffen Müller ◽  
Erick M. Carreira
Keyword(s):  
Nitrogen Heterocycles ◽  
Ring Expansion ◽  
Facile Synthesis
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