📜5-甲氧基-2-硝基苯甲酸置于sodium Dithionite,水,三乙胺,三氟乙酸酐体系中,用 乙醇,二氯甲烷 用作溶剂,化学反应 2.0H,反应生成2-氨基-5-甲氧基苯甲腈 参考文献: Heterocyclic Inhibitors Of Histamine Receptors For The Treatment Of Disease[fr] Inhibiteurs Hétérocycliques De Récepteurs De L'Histamine Destinés Au Traitement De Maladie 标题: Heterocyclic Inhibitors Of Histamine Receptors For The Treatment Of Disease[fr] Inhibiteurs Hétérocycliques De Récepteurs De L'Histamine Destinés Au Traitement De Maladie
专利号:US-4713383-A 优先权日:1984-10-01 标 题:Triazoloquinazoline compounds, and their methods of preparation, pharmaceutical compositions, and uses 发明人:FRANCIS JOHN E; GELOTTE KARL O 权利人:CIBA GEIGY CORP 摘要:[1,2,4]triazolo[1,5-c]quinazoline compounds of the formula wherein R1 is optionally substituted phenyl, pyridyl, furyl thienyl, dihydro or tetrahydro furanyl or thienyl, pyranyl, or 0-ribofuranosyl; R2 is hydrogen or lower alkyl; X is oxygen or NR3, R3 is as defined in the claims, and ring A is unsubstituted or substituted as set forth in the claims. The compounds wherein X is N-R3 are especially useful as adenosine antagonists and for the treatment of asthma. The compounds wherein X is oxygen are useful as benzodiazepine antagonists and as intermediates in the synthesis of the compounds wherein X is N-R3.