摘要:
Methods for searching for possible forms of a sample and methods of screening a sample according to its form comprise disposing the sample in at least one receptacle that defines a capillary space, such as a capillary tube. The sample is solidified to generate at least one solid form or semisolid form, and the generated form is analyzed and classified. The analysis may determine differences in molecular arrangement of the various forms or characteristics that reflect the form. The methods may employ a plurality of samples, conditions, or receptacles in an effort to generate a variety of forms, so that all or a high percentage of possible forms are obtained.
摘要:
Halonitroarylacetic acid esters are prepared by reacting a halonitroaromatic compound with an alpha,alpha-disubstituted acetic acid ester in an inert solvent and in the presence of a base. The halonitroarylacetic acid esters formed by the process can be readily converted into derivatives, such as pharmaceuticals.
摘要:
Fluoronitrolarylacetonitriles are prepared by reacting a fluoronitroaromatic compound having a nitro substituent, at least one fluoro substituent, and at least one replaceable hydrogen on (1) a benzene ring bearing at least one other innocuous substituent, (2) a heterocyclic aromatic ring, or (3) a carbocyclic aromatic ring of a polycyclic ring structure with an alpha,alpha-disubstituted acetonitrile in an inert solvent and in the presence of a base so that the nitrile undergoes a nucleophilic substitution on an unsubstituted ring carbon of the fluoronitroaromatic compound during which an alpha-substituent functions as a leaving group.
摘要:
Nitroarylacetic acid esters are prepared by reacting a nitroaromatic compound which is devoid of halogen on the aromatic ring carrying a nitro group with an alpha,alpha-disubstituted acetic acid ester in an inert solvent and in the presence of a base so that the ester undergoes a nucleophilic substitution on an unsubstituted ring carbon of the nitroaromatic compound during which an alpha-substituent functions as a leaving group. Nitrobenzene acetic acids and their esters are useful intermediates for the synthesis of pharmaceuticals.
摘要:
Nitrophenoxy- or nitrophenylthiobenzeneacetic acid esters are prepared by reacting a nitrophenoxy- or nitrophenylthiobenzene with an alpha,alpha-disubstituted acetic acid ester in an inert solvent and in the presence of a base. The products are useful as intermediates for the synthesis of pharmaceuticals, such as fenoprofen.
摘要:
Halonitroarylacetic acid esters are prepared by reacting a halonitroaromatic compound with an alpha,alpha-disubstituted acetic acid ester in an inert solvent and in the presence of a base. The halonitroarylacetic acid esters formed by the process can be readily converted into derivatives, such as pharmaceuticals.
摘要:
Nitrophenoxy- or phenylthiobenzeneacetonitriles are prepared by reacting a nitrophenoxy- or nitrophenylthiobenzene with an alpha,alpha-dinitrosubstituted acetonitrile in an inert solvent and in the presence of a base. The products are useful as intermediates for the synthesis of pharmaceuticals, such as fenoprofen.
摘要:
Nitroarylacetonitriles are prepared by reacting a nitroaromatic compound which is devoid of halogen on the aromatic ring carrying a nitro group with an alpha,alpha-disubstituted acetonitrile in an inert solvent and in the presence of a base so that the nitrile undergoes a nucleophilic substitution on an unsubstituted ring carbon of the nitroaromatic compound during which an alpha-substituent functions as a leaving group. Nitrobenzene acetic acids and their nitriles are useful intermediates for the synthesis of pharmaceuticals.
摘要:
A method for generating and isolating a high free energy form of a compound or a mixture of compounds comprises the steps of placing a sample in a capillary tube, solidifying the sample in the capillary tube, and isolating a high free energy form of the sample. A method for searching for a high free energy form of a sample comprises the steps of placing the compound or mixture in a capillary tube, generating a solid in the capillary tube, and determining whether a high free energy form of the sample was generated. The sample may be a compound or mixture.
摘要:
A method for generating and isolating a high free energy form of a compound or a mixture of compounds comprises the steps of placing a sample in a capillary tube, solidifying the sample in the capillary tube, and isolating a high free energy form of the sample. A method for searching for a high free energy form of a sample comprises the steps of placing the compound or mixture in a capillary tube, generating a solid in the capillary tube, and determining whether a high free energy form of the sample was generated. The sample may be a compound or mixture.