Abstract:
Disclosed herein is a highly safe and easily scalable process for the production of 7-Ethyl- 10-hydroxycamptothecin and its conversion to Irinotecan hydrochloride by total synthesis.
Abstract:
Disclosed herein is yogurt based nutritional compositions comprising polyphenolic compounds possessing demonstrated health and/or nutritional value, wherein the polyphenolic compounds are selected from Resveratrol, Fisetin and Quercetin derived from natural, synthetic and semi-synthetic origin.
Abstract:
The present invention discloses a process for efficient production of 2-amino-5- hydroxypropiophenone corresponding to the AB ring part of camptothecin (CPT) skelton, which is a key intermediate useful for the total synthesis of camptothecin analogs including 7-Ethyl-10-hydroxy camptothecin and novel intermediates thereof.
Abstract:
The present invention discloses a process for efficient production of 2-amino-5- hydroxypropiophenone corresponding to the AB ring part of camptothecin (CPT) skelton, which is a key intermediate useful for the total synthesis of camptothecin analogs including 7-Ethyl-10-hydroxy camptothecin and novel intermediates thereof.
Abstract:
The invention includes inter alia new methods for preparation of the pharmaceutically active compound 2-(4-fluorophenoxymethyl)-5-(4-N-hydroxyureidyl-1 -butynyl)-tetrahydrofuran and precursors thereof.
Abstract:
The invention includes inter alia new methods for preparation of the pharmaceutically active compound 2-(4-fluorophenoxymethyl)-5-(4-N-hydroxyureidyl-1-butynyl)-tetrahydrofuran and precursors thereof.
Abstract:
This invention relates to a process for the preparation of highly active and selective ammoxidation catalyst of formula (VO).sub.2 P.sub.2 O.sub.7 ,TiO.sub.2 or (VO).sub.2 P.sub.2 O.sub.7, Al.sub.2 O.sub.3, which process comprises refluxing a vanadium source in the presence of alcohols; adding a source of phosphorous to form vanadyl pyrophosphate hydrate (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 or (VO).sub.2 P.sub.2 O.sub.7.2H.sub.2 O ; Physical mixing of (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 with oxides selected from titania or alumina, and heating the resultant mixture in the presence of air at a temperature in the range of 300-600.degree.C. for a period in the range of 1 to 10 hours; and the use of said ammoxidation catalyst in the preparation of heteroaromatic nitrites.
Abstract translation:本发明涉及一种制备式(VO)2 P 2 O 7,TiO 2或(VO)2 P 2 O 7,Al 2 O 3的高活性和选择性氨氧化催化剂的方法,该方法包括在醇存在下回流钒源; 加入磷源形成焦磷酸氧钒水合物(VO)2H4P2O9或(VO)2P2O7.2H2O; (VO)2H 4 P 2 O 9与二氧化钛或氧化铝的氧化物的物理混合,在空气中,在300-600℃的温度范围内加热所得混合物1至10小时; 以及所述氨氧化催化剂在制备杂芳族亚硝酸盐中的用途。
Abstract:
This invention relates to a process for the preparation of highly active and selective ammoxidation catalyst of formula (VO).sub.2 P.sub.2 O.sub.7, TiO.sub.2 or (VO).sub.2 P.sub.2 O.sub.7, Al.sub.2 O.sub.3, which process comprises refluxing a vanadium source in the presence of alcohols; adding a source of phosphorous to form vanadyl pyrophosphate hydrate (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 or (VO).sub.2 P.sub.2 O.sub.7.2H.sub.2 O; Physical mixing of (VO).sub.2 H.sub.4 P.sub.2 O.sub.9 with oxides selected from titania or alumina, and heating the resultant mixture in the presence of air at a temperature in the range of 300-600.degree. C. for a period in the range of 1 to 10 hours; and the use of said ammoxidation catalyst in the preparation of heteroaromatic nitrites.
Abstract translation:本发明涉及一种制备式(VO)2 P 2 O 7,TiO 2或(VO)2 P 2 O 7,Al 2 O 3的高活性和选择性氨氧化催化剂的方法,该方法包括在醇存在下回流钒源; 加入磷源形成焦磷酸氧钒水合物(VO)2H4P2O9或(VO)2P2O7.2H2O; (VO)2H 4 P 2 O 9与二氧化钛或氧化铝的氧化物的物理混合,在空气中,在300-600℃的温度范围内加热所得混合物1至10小时; 以及所述氨氧化催化剂在制备杂芳族亚硝酸盐中的用途。
Abstract:
A process for the preparation of (+) (2S, 3S)-3-(2-aminophenylthio)-2-hydroxy-3-(4'-methoxyphenyl)-propionic acid which comprises treating the (.+-.) compound of (2RS, 3RS) 3-(2-aminophenylthio)-2-hydroxy-3-(4'-methoxyphenyl)-propionic acid (formula (II)) with the (+) compound of the 2-methylbenzylamine (formula (III)) and an alkali in the presence of a polar solvent, the amount of the compound of the formula (III) and the alkali being in half equivalent amount of compound of the formula (II) employed, separating the precipitate (+) amine salt form of (2-aminophenylthio)-2-hydroxy-3-(4'-methoxyphenyl)-propionic acid from the 1(-) salt form remaining in solution, by known methods treating the (+) amine salt from with an organic solvent and then decomposing the (+) amine salt form to produce (+)(2s, 3s)-3-(2-aminophenylthio)-2-hydroxy-3-(4'-methoxyphenyl)-propionic acid.
Abstract:
The invention provides new methods for preparation of cyclic oxygen compounds, including 2,5-disubstituted tetrahydrofurans, 2,6-disubstituted tetrahydropyrans, 2,7-disubstituted oxepanes and 2,8-oxocanes. The invention also provides new cyclic oxygen compounds and pharmaceutical compositions and therapeutic methods that comprise such compounds.