Ethyl 2-nitroacetoacetate as a new synthetic equivalent of ethoxycarbonylnitrile oxide
摘要:
It was shown that ethyl 2-nitroacetoacetate is a synthetic precursor of ethoxycarbonylnitrile oxide as well as of isoxazole- and isoxazoline-3-carboxylic acids and their esters. The elimination of acetic acid from ethyl 2-nitroacetoacetate occurs in a mixture of acetic acid and acetic anhydride in the presence of strong mineral acids, e.g., H2SO4, at room temperature and gives isoxazolines in yields of up to 85-91 %.
Bromobenzofuran-Based Non-peptide Antagonists of Angiotensin II: GR138950, a Potent Antihypertensive Agent with High Oral Bioavailability
作者:Duncan B. Judd、Michael D. Dowle、David Middlemiss、David I. C. Scopes、Barry C. Ross、Torquil I. Jack、Martin Pass、Elvira Tranquillini、Julie E. Hobson
DOI:10.1021/jm00045a016
日期:1994.9
in particular a trifluoromethanesulfonamide, should be better absorbed after oral administration and have enhanced oral bioavailability. This led to the identification of GR138950, a potent antihypertensiveagent in the renal hypertensive rat, causing sustained falls in blood pressure after oral administration. Oral bioavailability of GR138950 in rats and dogs is high, confirming that GR138950 is well
Methods of using pyrimidine-based antiviral agents
申请人:Tularik Inc.
公开号:US20030130264A1
公开(公告)日:2003-07-10
The invention provides novel methods of using substituted pyrimidine compounds and compositions for the treatment or prevention of diseases associated with CMV infection. In particular, the present invention provides methods for the treatment or prevention of cardiovascular diseases and organ transplant rejection.
Synthesis of ?-functional nitro compounds by the nitration of activated carbonyl compounds in a two-phase system
作者:V. P. Kislyi、A. L. Laikhter、B. I. Ugrak、V. V. Semenov
DOI:10.1007/bf00699138
日期:1994.1
Abstract2-Nitro-1,3-dicarbonyl and α-nitromonocarbonyl compounds were synthesized in the yields varying from moderate (30 %) to nearly quantitative by the nitration of β-dicarbonyl compounds in a two-phase system: sulfuric/nitric acid mixture-chloroform at - 10÷10 °C. The use of phase transfer conditions made it possible to avoid the formation of furoxans as by-products and to simplify the isolation
Compounds and compositions are provided which are useful for the treatment of viral infections, particularly human Cytomegalovirus infection. The compounds include novel pyrimidine-based derivatives.