Synthesis of α-silylalkylbenzoxazoles and oxazoles from stable silylketenes
作者:Stephen P. Marsden、James T. Steer、Barry S. Orlek
DOI:10.1016/j.tet.2009.03.105
日期:2009.7
Stable silylketenes, prepared by rhodium-catalysed decomposition of silyldiazoketones, undergo addition/cyclocondensation sequences with aminophenols and aminomalonate to give α-silylalkylbenzoxazoles and oxazoles, respectively. The silicon can be retained throughout functional group interconversions or can be removed by protodesilylation under acidic conditions as desired.
Antiinflammatory activity of novel indole derivatives
作者:M Verma、M Tripathi、AK Saxena、K Shanker
DOI:10.1016/0223-5234(94)90193-7
日期:1994.1
3-[(2-Imidazolyl, benzimidazolyl or benzoxazolyl)alkyl]indoles 2a-h were synthesized by cyclizing the carboxylic group of (3-indolyl)alkanoic acids 1 with ethylenediamine, o-phenylenediamine or o-aminophenol, respectively. Reaction of 1 with p-aminoacetophenone or aryl-substituted thiosemicarbazones yielded N-(4-acetylphenyl)-(2 or 4)-(indol-3-yl)alkylcarboxamides 3a-b or l-arylidene 4-[2-(indol-3-yl)(acetyl or propionyl)]thiosemicarbazides 5a-h; 3a-b were cyclized into N-[4-(2-aminothiazol-4-yl)phenyl]-(2 or 4)-(indol-3-yl)alkylcarboxamides 4a-b. Cyclization of 5a-h with malonic acid yielded 1-[2-(indol-3-yl)(acetyl or propionyl)]-3-arylideneamino-2-thiobarbituric acids 6a-h, which were finally converted into corresponding Mannich bases 7a-f. Compounds 2a-h, 4a-b, 6a-h and 7a-f were evaluated for their antiinflammatory activity. Compounds 2e, 2g, 4b, 6c and 6d exhibited promising antiinflammatory activity with a lower ulcerogenic liability than indomethacin.
KELAREV V. I.; SHVEXGEJMER G. A., XIMIYA GETEROTSIKL. SOEDIN., 1980, HO 5, 645-650
作者:KELAREV V. I.、 SHVEXGEJMER G. A.
DOI:——
日期:——
KARAKHANOV, R. A.;KELAREV, V. I.;KOKOSOVA, A. S.;NASYROV, I. M.;KUSHETZOV+, PROC. 5TH CONF. APPL. CHEM. UNIT. OPER. AND PROCESS., BALATONFURED, 3-7 S+
作者:KARAKHANOV, R. A.、KELAREV, V. I.、KOKOSOVA, A. S.、NASYROV, I. M.、KUSHETZOV+