62224-17-3Relevant articles and documents
Direct bromination of ethyl 5-alkylthiophene-2-carboxylates
Taydakov, Ilya V.,Krasnoselskiy, Sergey S.
experimental part, p. 2965 - 2968 (2010/10/19)
Approaches to brominated thiophene-2-carboxylic acids by electrophilic bromination of the corresponding acids and esters were compared and investigated. A synthetic route was developed involving direct bromination of ethyl 5-alkylthiophene-2-carboxylates followed by saponification of the resulting ethyl 5-alkyl-4-bromothiophene-2-carboxylates. The key bromination step is selective in dichloromethane solution at 0-5 °C and furnishes the corresponding ethyl 5-alkyl-4-bromothiophene-2-carboxylates in excellent yields. No migration or isomerization of the alkyl substituents was observed. Georg Thieme Verlag Stuttgart New York.
Heteroaryl amidines, methylamidines and guanidines, preparation thereof, and use thereof as protease inhibitors
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, (2008/06/13)
The present invention is directed to compounds of Formula I: wherein X is O, S or NR7and R1-R7, Y and Z are set forth in the specification, as well as hydrates, solvates or pharmaceutically acceptable salts thereof. Also described are methods for preparing the compounds of Formula I. The novel compounds of the present invention are potent inhibitors of proteases, especially trypsin-like serine proteases, such as chymotrypsin, trypsin, plasmin and urokinase. Certain of the compounds exhibit direct, selective inhibition of urokinase, or are intermediates useful for forming compounds having such activity.
