Concept

Acetonitrile

Related publications (39)

pi-Stacking in charged thiophene oligomers

The :T-stacking of oxidized thiophene oligomers is investigated using extensive ab initio quantum chemistry methods. Dimers of singly charged oligothiophenes are unstable in the gas phase but can be stabilized as bound dications in the singlet state by a p ...

2004

A hybrid TDDFT/MM investigation of the optical properties of aminocoumarins in water and acetonitrile solution

Ursula Röthlisberger

We present a hybrid time-dependent d. functional/mol. mechanics (TDDFT/MM) simulation study on the optical properties of aminocoumarins in gas phase and soln. As solvation is described through a mol. approach, the effects due to the inhomogeneities of the ...

2003

A homologous series of O- and N-functionalized 2,2-difluoro-1,3-benzodioxoles: An exercise in organometallic methodology

The conversion of 2,2-difluoro-1,3-benzodioxole, an exceptionally acidic arene, via a 4-lithiated intermediate into more than three dozen new derivs. was conceived as a case study. The lithiated species was trapped by C0-electrophiles (4-toluenesulfonyl az ...

2003

Hydroxylation of phenol over M-MCM-48

Albert Renken, Benoît Louis

The synthesis and characterization of M-MCM-48 (M = Si, Ti, V, Cr, and Mn) materials have been carried out. These systems promote hydroxylation of phenol with 30% H2O2 and the hydroxylation activity is highest for Ti-MCM-48. Water appears to be a better so ...

2001

Reliable chemical synthesis of oligoribonucleotides (RNA) with 2'-O-[(triisopropylsilyl)oxy]methyl(2'-O-tom)-protected phosphoramidites

A method for the introduction of the 2'-O-[(triisopropylsilyl)oxy]methyl (=tom) group into N-acetylated, 5'-O-dimethoxytritylated ribonucleosides is presented. The corresponding 2'-O-tom-protected phosphoramidite building blocks were obtained in pure form ...

2001

POLYETHYLENE-GLYCOL BOUND BENZYL-DERIVATIVES AND FLUORENYL-DERIVATIVES AS SOLUBILIZING SIDE-CHAIN PROTECTING GROUPS IN PEPTIDE-SYNTHESIS

The covalent attachment of polyethylene glycol (PEG) to commonly used protecting groups and their use in peptide synthesis was examined. PEG bound to fluorenyl- and benzyl- type side chain protection for Lys and Glu results in increased solubility of hydro ...

1994

Asymmetric synthesis. 29. Preparation of 1,8-diazaspiro[5.5]undecane derivatives

Jieping Zhu

From 2-cyano-6-phenyloxazolopiperidine, two highly efficient routes have been developed for the asym. synthesis of the spiropiperidine system: 1,8-diazaspiro[5.5]undecane. The key step was generation of the imine salts from the functionalized alpha -amino ...

1993

Asymmetric synthesis. XX. Preparation of a novel spiropiperidine system by the CN(R,S) method

Jieping Zhu

A novel spiropiperidine system I i.e. an aza structural analog of histrionicotoxin was constructed from 2-cyano-6-phenyloxazolopiperidine synthon II. The suitable quaternary carbon was created by alkylation at the position alpha to the nitrile followed by ...

1989

Removing solids suspended in an aqueous medium

Jutta Christine Wandrey

Suspended org. and inorg. solids are removed from aq. soln. by adding an improved water-sol. acryloguanamine copolymer flocculant with mol. wt. >2000 and contg. 0-1000 units each of acrylamide, vinyl guanamine, acrylic acid, trimerized acrylonitrile struct ...

(Institut fuer Wasserwirtschaft, Ger. Dem. Rep.).1985

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