专利号:US-4476315-A 优先权日:1982-04-30 标 题:Nucleophilic substitution process 发明人:STAHLY G PATRICK; STAHLY BARBARA C 权利人:ETHYL CORP 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.
专利号:US-4499026-A 优先权日:1982-08-25 标题 :Nucleophilic substitution process 发明人:STAHLY BARBARA C; STAHLY G PATRICK 权利人:ETHYL CORP 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.
专利号:US-4511729-A 优先权日:1982-04-30 标 题 :Nucleophilic substitution process 发明人:STAHLY G PATRICK; STAHLY BARBARA C 权利人:ETHYL CORP 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.
专利号:US-4502998-A 优先权日:1982-08-25 标题 :Nucleophilic substitution process 发明人:STAHLY BARBARA C; STAHLY G PATRICK 权利人:ETHYL CORP 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.