Synthesis of (?5-cyclopentadienyl) (?2-phenyl ethynyl ketone)dicarbonylmanganese and study of its properties

1979 ◽  
Vol 28 (9) ◽  
pp. 1902-1905 ◽  
Author(s):  
N. E. Kolobova ◽  
T. V. Rozantseva ◽  
P. V. Petrovskii
Keyword(s):  
Ethynyl Ketone

scholarly journals Gold-catalyzed reaction of oxabicyclic alkenes with electron-deficient terminal alkynes to produce acrylate derivatives

2013 ◽  
Vol 9 ◽  
pp. 1969-1976 ◽  
Author(s):  
Yin-wei Sun ◽  
Qin Xu ◽  
Min Shi
Keyword(s):  
Gold Catalyst ◽  
Addition Product ◽  
Terminal Alkynes ◽  
Mild Conditions ◽  
Ethynyl Ketone ◽  
Oxabicyclic Alkenes

Oxabicyclic alkenes can react with electron-deficient terminal alkynes in the presence of a gold catalyst under mild conditions, affording the corresponding addition products in moderate yields. When using alkynyl esters as substrates, the (Z)-acrylate derivatives are obtained. Using but-3-yn-2-one (ethynyl ketone) as a substrate, the corresponding addition product is obtained with (E)-configuration. The proposed mechanism of these reactions is also discussed.

Highly Efficient Synthesis of 2-Substituted 4H-Chromen-4-ones by means of F--Induced 6-Endo-Digonal Cyclization of o-(Silyloxy)phenyl Ethynyl Ketone Derivatives

1994 ◽  
Vol 59 (16) ◽  
pp. 4360-4361 ◽  
Author(s):  
Kazuhiko Nakatani ◽  
Akimitsu Okamoto ◽  
Mikito Yamanuki ◽  
Isao Saito
Keyword(s):  
Efficient Synthesis ◽  
Highly Efficient ◽  
Ethynyl Ketone

ChemInform Abstract: Nucleophilic Addition to Aryl Ethynyl Ketone: Addition of Oxygen Containing Nucleophiles to Terephthaloyl Acetylene.

ChemInform ◽  
2010 ◽  
Vol 28 (13) ◽  
pp. no-no
Author(s):  
R. K. TIWARI ◽  
A. K. SAXENA ◽  
P. S. VENKATARAMANI
Keyword(s):  
Nucleophilic Addition ◽  
Ethynyl Ketone

scholarly journals Elemental Chalcogen (Se, S) in PEG-400 to the Synthesis of Seleno- and Thioflavones from 2-Chlorophenyl Ethynyl Ketone and Nucleophilic Species of Chalcogen

2021 ◽  
Author(s):  
Patrick Nobre ◽  
Thiago Peglow ◽  
Ricardo Bartz ◽  
Angelita Barcellos ◽  
Raquel Jacob ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Sodium Atom ◽  
Simple Approach ◽  
Ring Closure ◽  
Green Method ◽  
Polyethylene Glycol 400 ◽  
Alkyl Aryl ◽  
Peg 400 ◽  
Ethynyl Ketone

An alternative green method was developed for the synthesis of thio- and selenoflavones by the ring closure of 2-chlorophenyl ethynyl ketone with NaHY (Y = S, Se). These nucleophilic chalcogen species were generated in situ using NaBH4 to reduce the elemental chalcogen in the presence of polyethylene glycol-400 (PEG-400). The efficiency of this reaction is strongly dependent on the PEG-400 solvent, acting like a crown ether, complexing with the sodium atom of NaHY species, making the chalcogen nucleophile more active. The synthetic protocol proceeded efficiently at 100 °C under argon, using a range of 2-chlorophenyl ethynyl ketone containing alkyl, aryl, or vinyl groups and the sulfur and selenium chalcogen. By this efficient and simple approach, 18 chalcogenoflavones were obtained in good to excellent yields after 2 h.

Reaction of a Phenol with an Ethynyl Ketone

2003 ◽  
pp. 1
Author(s):  
M. Nógrádi
Keyword(s):  
Ethynyl Ketone

ChemInform Abstract: Highly Efficient Synthesis of 2-Substituted 4H-Chromen-4-ones by Means of F--Induced 6-endo-digonal Cyclization of o-(Silyloxy)phenyl Ethynyl Ketone Derivatives.

ChemInform ◽  
2010 ◽  
Vol 26 (6) ◽  
pp. no-no
Author(s):  
K. NAKATANI ◽  
A. OKAMOTO ◽  
M. YAMANUKI ◽  
I. SAITO
Keyword(s):  
Efficient Synthesis ◽  
Highly Efficient ◽  
Ethynyl Ketone

ChemInform Abstract: REACTION OF CYCLOOCTATETRAENE WITH PHENYL ETHYNYL KETONE, A MILD CYCLOREVERSION

1973 ◽  
Vol 4 (51) ◽  
pp. no-no
Author(s):  
GOVERDHAN MEHTA ◽  
PUDUKKOTTAI S. VENKATARAMANI
Keyword(s):  
Ethynyl Ketone

Synthesis of hydrogen-terminated aliphatic bis(ethynyl ketone)s and aliphatic poly(enamine-ketone)s and poly(enonesulfide)s

1990 ◽  
Vol 28 (13) ◽  
pp. 3747-3759 ◽  
Author(s):  
J. M. Wilbur ◽  
B. A. Bonner
Keyword(s):  
Ethynyl Ketone

On the condensation of phenyl ethynyl ketone with cyclopentadiene—a reinvestigation

Tetrahedron ◽  
1972 ◽  
Vol 28 (5) ◽  
pp. 1249-1255 ◽  
Author(s):  
P.S. Venkataramani ◽  
S. Chandrasekharan ◽  
S. Swaminathan
Keyword(s):  
Ethynyl Ketone
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