摘要:
This invention relates to a cyclization process useful in the preparation of a key intermediate in the preparation of an endothelin antagonist of the general formula shown below: ##STR1##
摘要:
The present invention relates to an oxidation which converts a primary or secondary alcohol of Formula II: ##STR1## to an acid or ketone of Formula I: ##STR2## with periodic acid and a catalytic amount of a chromium reagent.
摘要:
The present invention relates to a TEMPO-catalyzed oxidation of primary alcohols, RCH.sub.2 OH to corresponding carboxylic acids, RCOOH in the presence of catalytic in the presence of catalytic amount of NaClO and stoichiometric amount of NaClO.sub.2 as an oxidant. ##STR1##
摘要:
The present invention relates to a periodic acid oxidation which converts the penultimate intermediate bearing a primary alcohol to the target endothelin antagonist compound of Formula I having a carboxylic acid.
摘要:
The present invention relates to an oxidation using sodium chlorite in the presence of a catalytic amount of TEMPO and sodium hypochlorite which converts the penultimate intermediate bearing a primary alcohol to the target endothelin antagonist compound of Formula I having a carboxylic acid ##STR1##
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist the synthesis of this key intermediate via an asymmetric conjugate addition reaction.
摘要:
The invention encompasses a process for making compounds of Formula I useful in the treatment of inflammation and other cyclooxygenase-2 mediated diseases.
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist and the synthesis of this key intermediate using an asymmetric conjugate addition reaction.
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist, the synthesis of this key intermediate and the synthesis of an endothelin antagonist using this intermediate in a stereoselective deoxygenation reaction.
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist and the synthesis of this key intermediate using an asymmetric conjugate addition reaction.