The Formation of Benzoxacin-3-ones via Intramolecular Nicholas Reactions and Synthesis of 8- Membered Heliannuols

2021 ◽  
Author(s):  
Brent St. Onge ◽  
James Green
Keyword(s):  
Propargyl Ether

The γ- carbonyl cations generated from propargyl ether-(Co2CO)6 complexes undergo intramolecular Nicholas reactions to give dehydrobenzoxacin-3-one-Co2(CO)6 complexes in good yields. Reductive decomplexation and subsequent manipulation allows the synthesis of (±)-heliannuol...

Low-Density Phenolic Syntactic Foams: Processing and Properties

2007 ◽  
Vol 26 (4) ◽  
pp. 229-244 ◽  
Author(s):  
Bibin John ◽  
C.P. Reghunadhan Nair ◽  
K.N. Ninan
Keyword(s):  
Phenolic Resin ◽  
Mechanical Performance ◽  
Volume Fraction ◽  
Mechanical Analysis ◽  
Low Density ◽  
Syntactic Foams ◽  
Novolac Resin ◽  
High Concentration ◽  
Volume Percentage ◽  
Propargyl Ether

Low-density phenolic syntactic foams with different volume percentages of microballoons were processed and their mechanical performance has been evaluated in terms of tensile, flexural, compressive and the corresponding specific properties. Tensile and flexural strength increased with volume fraction of microballoon and optimized at 72–74 percentage by volume of microballoon. Both the properties decreased with further addition of microballoon. The corresponding specific properties also manifested a similar order. Compressive and specific compressive strength decreased with increase in microballoon volume percentage. The flexural and compressive modulus values followed the same trend as the strength values. The properties of phenolic syntactic foams were compared with syntactic foams based on an addition cure phenolic resin, Propargyl Ether Novolac resin (PN). The mechanical properties of the latter were inferior to those of phenolic syntactic foams. The morphology of the failed samples as examined by SEM showed that failure occurred by a combination of matrix and microballoon failure at low microballoon loading whereas it occurred by microballoon cracking and resin to microballoon debonding at high concentration of filler. The dynamic mechanical analysis of phenolic and PN resin syntactic foams showed a higher use temperature for PN system in comparison to phenolic.

Formation of 2-indanone and benzocyclobutene from the pyrolysis of phenyl propargyl ether

1972 ◽  
Vol 94 (16) ◽  
pp. 5911-5913 ◽  
Author(s):  
Walter S. Trahanovsky ◽  
Patrick W. Mullen
Keyword(s):  
Propargyl Ether

ChemInform Abstract: SYNTHESIS OF MONO(Γ-TRIMETHYLSILYL)PROPARGYL ETHER OF CYCLOPENTANE-1,2-DIOL AND ITS DERIVATIVES

1976 ◽  
Vol 7 (1) ◽  
pp. no-no
Author(s):  
K. A. ANDRIANOV ◽  
I. A. SHIKHIEV ◽  
S. F. KARAEV ◽  
A. K. KHABIBOVA
Keyword(s):  
Propargyl Ether

ChemInform Abstract: PROPARGYL ETHER OF α-PHENYLETHYL ALCOHOL AND ITS DERIVATIVES

1980 ◽  
Vol 11 (35) ◽  
Author(s):  
S. F. KARAEV ◽  
D. S. DZHAFAROV ◽  
M. E. ASKEROV
Keyword(s):  
Phenylethyl Alcohol ◽  
Propargyl Ether

Synthesis and Some Reactions of 2-Bromocyclohexyl Propargyl Ether.

ChemInform ◽  
2005 ◽  
Vol 36 (22) ◽  
Author(s):  
G. M. Talybov ◽  
S. F. Karaev ◽  
U. G. Nurieva ◽  
M. E. Askerov ◽  
R. A. Teimurova
Keyword(s):  
Propargyl Ether

ChemInform Abstract: CYCLIZATION OF GLYCIDYL PROPARGYL ETHER

1977 ◽  
Vol 8 (26) ◽  
pp. no-no
Author(s):  
I. A. SHIKHIEV ◽  
N. A. AGAMIRZOEV ◽  
S. F. KARAEV ◽  
E. A. AKHUNDOV ◽  
M. N. SHINTEMIROVA
Keyword(s):  
Propargyl Ether

scholarly journals Extension of the 5-alkynyluridine side chain via C–C-bond formation in modified organometallic nucleosides using the Nicholas reaction

2020 ◽  
Vol 16 ◽  
pp. 1-8 ◽  
Author(s):  
Renata Kaczmarek ◽  
Dariusz Korczyński ◽  
James R Green ◽  
Roman Dembinski
Keyword(s):  
Bond Formation ◽  
Side Chain ◽  
Nicholas Reaction ◽  
Propargyl Ether ◽  
Dicobalt Hexacarbonyl

Dicobalt hexacarbonyl nucleoside complexes of propargyl ether or esters of 5-substituted uridines react with diverse C-nucleophiles. Synthetic outcomes confirmed that the Nicholas reaction can be carried out in a nucleoside presence, leading to a divergent synthesis of novel metallo-nucleosides enriched with alkene, arene, arylketo, and heterocyclic functions, in the deoxy and ribo series.

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