申请人:Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
公开号:US04245093A1
公开(公告)日:1981-01-13
There is described a process for the production of theophylline derivatives of the formula ##STR1## where T is the theophyllinyl-(7)-residue, Alk is a straight or branched alkylene chain having 2 to 4 carbon atoms, R is hydrogen or a methyl group, n is 1 or 2 with the proviso that two hydroxy groups of the phenyl ring cannot be in the 3,4-positions by reacting an aminoalkyltheophylline of the formula ##STR2## with a bromoketone of the formula ##STR3## where R' is a lower alkyl group and the two --OCOR' groups of the phenyl ring cannot be in the 3,4 positions to an intermediate compound of the formula ##STR4## and subsequently hydrolytically splitting off the R'CO protective group wherein the bromoketone of formula III is produced free of dibromide by bromination of a ketone of the formula ##STR5## followed by treatment with a lower trialkyl phosphite.
描述了一种合成公式为##STR1##的茶碱衍生物的方法,其中T是茶碱基(7)-残基,Alk是具有2至4个碳原子的直链或支链烷基链,R是氢或甲基基团,n为1或2,但苯环的两个羟基不能处于3,4-位置。该方法通过将公式为##STR2##的氨基烷基茶碱与公式为##STR3##的溴酮反应,其中R'是低碳基基团,苯环的两个--OCOR'基团不能处于3,4位置,得到公式为##STR4##的中间化合物,然后水解去除R'CO保护基团,其中公式III的溴酮是通过将公式为##STR5##的酮溴化而得到的,随后用低三烷基膦酸酯处理以去除双溴化物。