Synthesis of aliphatic polyamides containing 4-phenylurazole linkages
Abstract
4-Phenylurazole (1) was reacted with excess acetyl chloride in N,N-dimethylacetamide (DMAc) solution at room temperature. The reaction occurred in quantitative yield with acetylation of both of the N![[BOND]](http://onlinelibrarystatic.wiley.com/undisplayable_characters/00f8ff.gif)
H bonds of the urazole group.
Synthesis and Characterization of Novel Optically Active Poly(amide-imide)s.
Abstract
4,4′-(Hexafluoroisopropylidene)-bis-(phthalic anhydride) (1) was reacted with L-leucine (2) in toluene solution at refluxing temperature in the presence of triethylamine and the resulting imide-acid (4) was obtained in quantitative yield.
An Efficient Method for Production and Storage of Unstable S-Nitrosothiols Under Mild and Heterogeneous Condition with Sodium Nitrite and Oxalic Acid Dihydrate
Abstract
Thiols can be readily converted to their corresponding nitrosothiols with a combination of oxalic acid and sodium nitrite in t-butanol at room temperature (26-30°C).
A convenient and mild procedure for the synthesis of alkyl p-toluenesulfinates under solvent-free conditions using microwave irradiation
Abstract
The reactions of aliphatic alcohols with p-toluenesulfinic acid are accelerated by microwave irradiation under solvent-free conditions in the presence of silica gel to afford a high yielding synthesis of p-toluenesulfinate esters.
An Efficient Method for Production and Storage of Unstable S-Nitrosothiols Under Mild and Heterogeneous Condition with Sodium Nitrite and Oxalic Acid Dihydrate
Abstract
Thiols can be readily converted to their corresponding nitrosothiols with a combination of oxalic acid and sodium nitrite in t-butanol at room temperature (26-30°C).
BENZYLTRIPHENYLPHOSPHONIUM PEROXODISULFATE (PhCH2PPh3)2S2O8: A MILD AND INEXPENSIVE REAGENT FOR HIGHLY ENANTIOMERIC PURITY OF α-SULFINYL OXIMES AND α-SULFINYL HYDRAZONES TO THE CORRESPONDING β-KETO SULFOXIDES
ABSTRACT
Benzyltriphenylphosphoniumperoxodisulfate (PhCH2PPh3)2S2O, (I) is readily prepared as an white solid from benzyltriphenylphosphoniumchloride, performs conversion of α-sulfinyl oximes (2) and α-sulfinyl hydrazones (4) to the corresponding β-keto sulfoxides (3) in high yields and high enantiomeric purity.