carbonic acid/dichloromethane

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Preparation of N-9-fluorenylmethoxycarbonylamino acid chlorides from mixed anhydrides by the action of hydrogen chloride.

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N-9-Fluorenylmethoxycarbonyl-(Fmoc) amino-acid chlorides have been prepared by reaction of hydrogen chloride on purified mixed Fmoc-amino acid-monoalkyl carbonic acid anhydrides in dichloromethane. The products partially undergo subsequent conversion to the corresponding esters due to the presence

Five-coordinate iron-porphyrin as a model for the active site of hemoproteins. Characterization and coordination properties.

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Preparation of iron(III)-deuteroporphyrin 6(7)-methyl ester, 7(6)-(histidine methyl ester) by coupling histidine methyl ester to deuterohemin has been performed using the mixed carboxylic/carbonic-acid-anhydride method. This compound, which is very soluble in various organic solvents, can be

Studies on the disproportionation of mixed anhydrides of N-alkoxycarbonylamino acids.

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Mixed anhydrides from Z-valine and ethyl, isobutyl, isopropyl and isopropenyl chloroformate, and from N-tert-butoxycarbonyl- (Boc) and N-benzyloxycarbonyl- (Z) leucine and phenylalanine and Boc- and N-9-fluorenylmethoxycarbonyl-valine and ethyl chloroformate were purified and left in dichloromethane

Malignant transformation of Syrian hamster kidney cells in vitro by interaction of airborne particulates and simian virus (SV-) 40.

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Permanent inhalation of great variety of air pollutants raises serious problems concerning adverse effects on human health. Especially in airborne particulates more than 1000 inorganic and organic compounds have been detected, among them also carcinogens and mutagens, such as polycyclic aromatic

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