申请人:Korea Institute of Science and Technology
公开号:US05756731A1
公开(公告)日:1998-05-26
A process for preparing (-)3(S)-methylbenzoxazine derivative of formula (I) comprising the steps of reacting the compound of formula (II) with benzoic acid, triphenylphosphine and diethyl azodicarboxylate in an organic solvent to obtain the compound of formula (III); hydrogenating the compound of formula (III) in the presence of a metallic catalyst to provide the compound of formula (IV); hydrolyzing the compound of formula (IV) to give the compound of formula (V); and reacting the compound of formula (V) with diethyl azodicarboxylate, triphenylphosphine, and zinc chloride in an organic solvent. The obtained (-)3(S)-methylbenzoxazine derivative is a useful intermediate for preparing an antibacterial agent which has a potent bacteriocidal effect. ##STR1##
制备(-)3(S)-甲基苯并噁嗪衍生物的方法,包括以下步骤:将化合物(II)与苯甲酸、三苯基膦和二乙基双甲酰胺在有机溶剂中反应,以获得化合物(III);在金属催化剂存在下氢化化合物(III)以得到化合物(IV);水解化合物(IV)以得到化合物(V);将化合物(V)与二乙基双甲酰胺、三苯基膦和氯化锌在有机溶剂中反应。获得的(-)3(S)-甲基苯并噁嗪衍生物是制备具有强效杀菌作用的抗菌剂的有用中间体。