The Thermal Decomposition of Alkoxycarbonyl Thiocyanates and Isothiocyanates

1975 ◽  
Vol 53 (6) ◽  
pp. 907-912 ◽  
Author(s):  
Dennis Liotta ◽  
Robert Engel
Keyword(s):  
Thermal Decomposition ◽  
Primary Alcohols ◽  
Reduced Pressure ◽  
Tertiary Alcohols ◽  
Alkyl Amines ◽  
Tertiary Alkyl

Alkoxycarbonyl thiocyanates and isothiocyanates have been decomposed thermally under reduced pressure at temperatures of 240–375°. Primary systems yield primarily alkyl thiocyanates, whereas secondary and tertiary systems yield alkyl isothiocyanates. The viability of using this reaction in a conversion of primary alcohols to primary alkyl thiols and secondary and tertiary alcohols to tertiary alkyl amines is discussed.

Synthesis of Tertiary Alkyl Amines from Terminal Alkenes: Copper-Catalyzed Amination of Alkyl Boranes

2012 ◽  
Vol 134 (15) ◽  
pp. 6571-6574 ◽  
Author(s):  
Richard P. Rucker ◽  
Aaron M. Whittaker ◽  
Hester Dang ◽  
Gojko Lalic
Keyword(s):  
Alkyl Amines ◽  
Terminal Alkenes ◽  
Tertiary Alkyl

Thermal decomposition behaviors of β-cyclodextrin, its inclusion complexes of alkyl amines, and complexed β-cyclodextrin at different heating rates

2007 ◽  
Vol 60 (3-4) ◽  
pp. 223-233 ◽  
Author(s):  
Le Xin Song ◽  
Chuan Feng Teng ◽  
Peng Xu ◽  
Hai Ming Wang ◽  
Zi Qiang Zhang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Inclusion Complexes ◽  
Heating Rates ◽  
Alkyl Amines

Composition effects on optical absorption spectra of solvated electrons in alcohol/water mixed solvents

1982 ◽  
Vol 60 (18) ◽  
pp. 2342-2350 ◽  
Author(s):  
Ah-Dong Leu ◽  
Kamal N. Jha ◽  
Gordon R. Freeman
Keyword(s):  
Optical Absorption ◽  
Pure Water ◽  
High Energy ◽  
Band Width ◽  
Primary Alcohols ◽  
Solvated Electrons ◽  
Tertiary Butyl ◽  
Composition Effects ◽  
Tertiary Alcohols ◽  
Alcohol Water

Addition of a few percent of water to an alcohol has a relatively large effect on the shape of the optical absorption spectrum of solvated electrons in the liquid. This occurs whether the optical absorption energy in the pure alcohol is greater or smaller than that in water. Addition of up to 10 mol% of water causes EAmax in methanol and primary alcohols to decrease, while it increases in secondary and tertiary alcohols. At around 10 mol% water in primary alcohols EAmax passes through a minimum and increases again at higher water concentrations, reaching a plateau at about 30 mol% and remaining constant up to about 95 mol% water; over the last part of the composition range to pure water EAmax decreases slightly. The behavior in secondary and tertiary alcohols containing > 30 mol% water is similar to that in primary alcohols. The width of the band at half height W1/2 is divided at EAmax into "red side" and "blue side" portions Wr, and Wb, respectively. In methanol and in primary and secondary alcohols, addition of up to 30 mol% of water greatly reduces Wb but has relatively little effect on Wr. At > 30 mol% water Wb and Wr are similar to those in pure water. In tertiary butyl alcohol the band width is similar to that in pure water, so addition of water to the alcohol makes little change in the band width. The water/alcohol composition effects on the es− absorption band parameters are attributed to changes in solvent structure. This is especially evidenced by the minimum in EAmax at 10 mol% water in a primary alcohol. The changes in band asymmetry Wb/Wr indicate that the types of electronic transition on the low and high energy sides of the band are different.

Primary alcohols and di-alcohols as growth substrates for the purple nonsulfur bacteriumRhodobacter capsulatus†

2000 ◽  
Vol 46 (12) ◽  
pp. 1166-1170
Author(s):  
Panagiotis E Pantazopoulous ◽  
Michael T Madigan
Keyword(s):  
Fatty Acids ◽  
Organic Acids ◽  
Rhodobacter Capsulatus ◽  
Carbon Sources ◽  
Purple Nonsulfur Bacteria ◽  
Alcohol Metabolism ◽  
Primary Alcohols ◽  
Tertiary Alcohols ◽  
Unsaturated Alcohols ◽  
Growth Experiments

Growth experiments were performed with the purple nonsulfur bacterium Rhodobacter capsulatus to test its ability to use aliphatic, methyl-substituted, and unsaturated alcohols, as well as di-alcohols, as carbon sources for growth. Both phototrophic and chemotrophic growth was observed on a wide variety of such alcohols. By contrast, secondary or tertiary alcohols, or primary alcohols containing an ethyl or propyl substituent, did not support growth. In addition, preculture history and serial subculturing were found to be important factors for obtaining reliable growth of R. capsulatus on alcohols. Collectively, these results suggest that the carbon nutritional diversity of Rhodobacter capsulatus is even greater than previously suspected and that besides metabolizing organic acids and fatty acids in nature, this species may also be a major consumer of alcohols.Key words: purple nonsulfur bacteria, Rhodobacter capsulatus, alcohol metabolism, primary alcohols, di-alcohols.

scholarly journals Tetrahydropyranyl protection and deprotection of alcohols using a niobium-based Brønsted acid catalyst

2016 ◽  
Vol 94 (8) ◽  
pp. 712-714 ◽  
Author(s):  
Charles-Oneil L. Crites ◽  
Filipe Matos Lima ◽  
M. Luisa Marin ◽  
Jose Carlos Netto-Ferreira ◽  
Stefania Impellizzeri ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Steric Hindrance ◽  
Niobium Oxide ◽  
Acid Catalyst ◽  
Acid Sites ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Primary Alcohols ◽  
Tertiary Alcohols ◽  
Brönsted Acid

Solid niobium oxide treated with phosphoric acid (NbP) was used as a heterogeneous catalyst in the protection of a series of aliphatic alcohols as tetrahydropyranyl (THP) derivatives. Protection of primary alcohols using this material with strong Brønsted acid sites was achieved in good yields (75%–94%), while moderate values were obtained in the protection of secondary and tertiary alcohols (50%–84%), largely dependent on the steric hindrance in the proximity of the hydroxyl moiety. NbP also catalyzed deprotection of THP ethers derived from primary alcohols and phenol with moderate yields (65%–99%).

ChemInform Abstract: Fluorination of Secondary and Primary Alcohols by Thermal Decomposition of Electrochemically Generated Alkoxy Triphenylphosphonium Tetrafluoroborates.

ChemInform ◽  
2010 ◽  
Vol 28 (11) ◽  
pp. no-no
Author(s):  
H. MAEDA ◽  
T. KOIDE ◽  
S. MATSUMOTO ◽  
H. OHMORI
Keyword(s):  
Thermal Decomposition ◽  
Primary Alcohols
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