The synthesis and antiallergic activity of a series of 4-(arylamino)-2,5-dihydro-2-oxo-N-(trans-2-phenyl-cyclopropyl)furan-3-carboxamides 10 are described. Treatment of N-substituted 2-amino-4,5-dihydro-4-oxofuran-3-carboxylic acids 9 with chlorooxobis(2-oxo-1,3-oxazolidin-3-yl)phosphorus (2) and an appropriate aromatic amine in the presence of Et3N, resulted in a novel 3(2H)-furanone-2(5H)-furanone
描述了一系列4-(芳基
氨基)-2,5-二氢-2-氧代-N-(反式-2-苯基-环丙基)
呋喃-3-羧酰胺10的合成和抗过敏活性。的治疗ñ -取代的2-
氨基-4,5-二氢-4-氧代
呋喃-3-
羧酸9与chlorooxobis(2-氧代-
1,3-恶唑烷-3-基)
磷(2)和适当的芳胺在Et 3 N的存在下,导致了新颖的3(2 H)-
呋喃酮-2(5 H)-
呋喃酮重排,这使得新酰胺的制备变得容易10。当在大鼠的皮肤血管通透性和活性过敏性试验中进行测试时,后者发挥了有效的抗过敏作用。当以100 mg / kg的剂量腹膜内给予大鼠时,活性最高的化合物10b分别抑制94、92和100%的
血清素,
组胺和
缓激肽的作用。本系列的10个代表一类新的抗过敏剂。