Patent GB-1440264-A (GB)
Title: 1,6-and 1,5-anhydrofuranose derivatives and process for their manufacture
IPC: C07H19/01
Filed: 1973-05-30
Abstract: 1440264 1,5- and 1,6-anhydro-furnaces CIBA-GEIGY AG 30 May 1973 [30 May 1972 26 Sept 1972 17 April 1973] 25654/73 Heading C2C Novel compounds in which R 2  is hydrogen, alkyl, alkenyl, or alkylaminoalkyl (in which the amino group is option, ally alkylated) or acyl, R 3  is hydrogen, alkyl, alkenyl, aralkyl or acyl and A-O is -CH(CH 2 OR 6 )-O- or -CH 2 O- in which R 5  and R 6  have one of the meanings indicated for R 3 , and two of the radicals R 2 , R 3  and R 5  or R 6  together may represent an ylidene radical, and one of the radicals R 2 , R 3  and R 5  or R 6  is different from hydrogen if the other two of these radicals are hydrogen, different from methyl if the other two of these radicals are methyl, different from acetyl if the other two of the radicals are acetyl, different from p-toluenesulphonyl if the other two of these radicals are p-toluenesulphonyl and different from hydrogen and acetyl if the other two radicals together are isopropylidene, and in compounds with as the -A-O- radical, one of the radicals R 2 , R 3  and R 6  is different from benzyl and trityl if the other two radicals are benzyl are prepared by (1) treating with an acid or base a compound II in which (i) X 1  or X 2  is hydroxyl and the other is halogen (ii) X 1  and X 2  are free reactive esterified, or reactive etherified hydroxy (preferably acetoxy) and additionally X 2  together with OR 2  may represent epoxy or (iii) X 1  is a reactive esterified hydroxy (preferably p-toluenesulphonyloxy) and X 2  is acyloxy (preferably benzoyloxy) or (2) introducing a radical R 2 , R 3  and R 5  or R 6 , which is different from hydrogen into a compound III Compound III are reacted with reactive esters of alkanols, alkenols and aralkanols or an hydroxyl group in compound III is converted to halogen and reacted with the alcohol or a metal salt thereof. Acyl radicals R 2 , R 3  and R 5  or R 6  are introduced by reaction with the corresponding acid halide or anhydride. Compounds I are also prepared by converting or modifying the substituent aroups R 2 , R 3  and R 6  by conventional proceedures. Aryl represents alkanoyl, aroyl, alkylsulphonyl, arylsulphonyl, carbamoyl or substituted carbamoyl. Compounds I prepared are those in which A is -CHOR 5 -CH 2 -, R 2  is hydrogen, alkyl, C 2-4  alkanoyl, benzoyl, ohydroxybenzoyl o-acetoxybenzoyl, naphthoyl, pyridylcarbonyl methyl or p-toluene-sulphonyl, N-methyl or N-phenyl carbamoyl or 2-diethylaminoethyl and R 3  and R 5  are independantly C 1-3  alkyl, benzyl chlorobenzyl, benzoyl, ohydroxybenzoyl, o - acetoxybenzoyl or naphthoyl; also A is -CH(CH 2 OR 6 )- and R 2 , R 3  and R 6  are hydrogen or C 1-3  alkyl. Sugar residues are 1,6-anhydro-glucofuranose-, fallefuranose and -mannofuranose and 1,5-anhydro-xylofuranose. 1,6 - Anhydro - 3,5 - di - o - benzyl - 2 - oxo - #- D-glucofuranose is prepared by reaction of 1,6- anhydro - 3,5 - di - o - benzyl - # - D glucofuranose with P 4 O 10 . Compounds I show fibrinolytic and thrombolytic activity and certain compounds containing benzoyl groups also show anti-inflammatory and analgesic activity. Compounds I form with an excipient a pharmaceutical composition which may be administered orally, parenterally or topically.