申请人:Massachusetts Institute of Technology
公开号:US04143046A1
公开(公告)日:1979-03-06
In accordance with this invention, it has been found that carbon and oxygen analogs of 6.beta.-aminopenicillanic acid and biologically active derivatives thereof can be formed from esters of 6-oxopenicillanic acid. For example, 6.beta.-phenoxyacetoxypenicillanic acid -- an oxygen analog of penicillin V and 6.beta.-phenoxyacetylmethylpenicillanic acid -- a carbon analog of penicillin V, may be formed from an ester of 6-oxopenicillanate. The ester of 6-oxopenicillanic acid is formed by a diiospropyl carbodiimide/dimethyl sulfoxide oxidation of the corresponding ester of 6.alpha.-hydroxypenicillanic acid. The oxygen analogs are formed by reducing the ester of 6-oxopenicillanic acid to the corresponding 6.beta.-hydroxypenicillanate and then forming the desired analog by acylation. The carbon analogs are formed by a Wittig reaction of the ester of 6-oxopenicillanic acid with a suitable acylmethylenetriphenylphosphorane followed by saturation of the newly formed double bond and removal of the protective ester group.
根据这项发明,发现可以从6-氧代青霉素酸的酯类形成6.beta.-氨基青霉素酸和其生物活性衍生物的碳和氧类似物。例如,6.beta.-苯氧乙酰氧基青霉素酸--青霉素V的氧类似物和6.beta.-苯氧乙酰甲基青霉素酸--青霉素V的碳类似物,可以从6-氧代青霉素酸的酯类形成。6-氧代青霉素酸的酯类是通过对应的6.alpha.-羟基青霉素酸的酯类经过二异丙基碳二亚胺/二甲基亚砜氧化形成的。氧类似物是通过将6-氧代青霉素酸的酯类还原为相应的6.beta.-羟基青霉素酸酯类,然后通过酰化形成所需的类似物。碳类似物是通过将6-氧代青霉素酸的酯类与适当的酰亚甲基三苯基膦烯进行Wittig反应,然后饱和新形成的双键并去除保护酯基而形成的。