Acid Catalyzed a-Pyrone Ring Formation Reactions

Heterocycles ◽  
1994 ◽  
Vol 37 (3) ◽  
pp. 1705 ◽  
Author(s):  
Okan Tarhan ◽  
Cihangir Tanyeli ◽  
Ayhan S. Demir ◽  
�demir �arslan ◽  
Idris Mecidoglu
Keyword(s):  
Ring Formation ◽  
Pyrone Ring ◽  
Acid Catalyzed

ChemInform Abstract: Acid-Catalyzed α-Pyrone Ring Formation Reactions.

ChemInform ◽  
2010 ◽  
Vol 25 (43) ◽  
pp. no-no
Author(s):  
C. TANYELI ◽  
A. S. DEMIR ◽  
OE. OEZARSLAN ◽  
I. MECIDOGLU ◽  
O. TARHAN
Keyword(s):  
Ring Formation ◽  
Pyrone Ring ◽  
Acid Catalyzed

Cut and sew: benzofuran-ring-opening enabled cyclopentenone ring formation

2020 ◽  
Vol 56 (84) ◽  
pp. 12817-12820
Author(s):  
Kai Wang ◽  
Chenghao Jiang ◽  
Zhenming Zhang ◽  
Chunyu Han ◽  
Xuewei Wang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Cascade Reaction ◽  
Ring Formation ◽  
Acid Catalyzed

A broad range of fully substituted cyclopentenones are constructed efficiently via an acid catalyzed cascade reaction involving an unprecedented benzofuran-ring-opening.

Direct Synthesis of 5-Acyl-3-oxy-4-pyrones Based On Acid-­Catalyzed Acylation of Enaminodiones with Acylbenzotriazoles via Soft Enolization

Synthesis ◽  
2020 ◽  
Vol 52 (15) ◽  
pp. 2267-2276 ◽  
Author(s):  
Dmitrii L. Obydennov ◽  
Viktoria V. Viktorova ◽  
Elena V. Chernyshova ◽  
Alexander S. Shirinkin ◽  
Sergey A. Usachev ◽  
...  
Keyword(s):  
Ring Opening ◽  
Direct Synthesis ◽  
Pyrone Ring ◽  
Mild Conditions ◽  
Soft Enolization ◽  
Acid Catalyzed

A novel convenient acid-catalyzed acylation of enaminodiones with acylbenzotriazoles via soft enolization has been developed for the direct synthesis of hard-to-reach 5-acyl-3-oxy-4-pyrones. The important advantages of the reaction include broad substrate scope, mild conditions, scalability, and readily isolation of products by crystallization without the use of chromatography. Further modification of the pyrone ring and synthesis of various azaheterocycles via ring-opening transformation have been demonstrated for the preparation of potential scaffolds for inhibition of metalloenzymes.

scholarly journals In vitro reconstitution of α-pyrone ring formation in myxopyronin biosynthesis

2015 ◽  
Vol 6 (8) ◽  
pp. 5076-5085 ◽  
Author(s):  
H. Sucipto ◽  
J. H. Sahner ◽  
E. Prusov ◽  
S. C. Wenzel ◽  
R. W. Hartmann ◽  
...  
Keyword(s):  
Natural Products ◽  
Polyketide Synthase ◽  
Ring Formation ◽  
Type I ◽  
Pyrone Ring ◽  
In Vitro Reconstitution

α-Pyrone rings exist in many polyketide synthase (PKS) derived natural products. We report the first in vitro reconstitution of α-pyrone ring formation by a type I PKS using chemically synthesized substrates.

Enzymology of Anthraquinone-γ-Pyrone Ring Formation in Complex Aromatic Polyketide Biosynthesis

2018 ◽  
Vol 57 (41) ◽  
pp. 13475-13479 ◽  
Author(s):  
Xian-Feng Hou ◽  
Yu-Jiao Song ◽  
Mei Zhang ◽  
Wenxian Lan ◽  
Song Meng ◽  
...  
Keyword(s):  
Ring Formation ◽  
Pyrone Ring ◽  
Polyketide Biosynthesis
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