Synthesis of 4-alkoxycarbonyl-butenolides by uncatalyzed one-pot cyclization of 1,3-bis(silyloxy)alk-1-enes with oxalyl chloride
摘要:
3-Hydroxy-4-alkoxycarbonyl-butenolides were prepared by one-pot cyclizations of 1,3-bis(silyloxy)alk-1-enes with oxalyl chloride. (c) 2007 Elsevier Ltd. All rights reserved.
The present invention relates to substituted hydroxyureas. These compounds inhibit the enzyme 5-lipoxygenase. In addition, certain of the compounds also inhibit the enzyme-cyclooxygenase. The compounds are useful for treating asthma, allergies, arthritis, posoriasis, ischemia, dermatitis, inflammation and/or broncho-constriction and/or inflammatory diseases of the eye.
3-Hydroxy-4-alkoxycarbonyl-butenolides were prepared by one-pot cyclizations of 1,3-bis(silyloxy)alk-1-enes with oxalyl chloride. (c) 2007 Elsevier Ltd. All rights reserved.