申请人:Pfizer Inc.
公开号:US04110342A1
公开(公告)日:1978-08-29
Azidomethylarylacetic acids and derivatives thereof are prepared by oxidative rearrangement of the corresponding azidomethylarylmethyl ketones effected by thallium (III) nitrate in the presence of methanol or ethanol and certain acids to obtain methyl or ethyl esters of the desired azidomethylarylacetate. When desired, the acids are obtained by hydrolysis of said esters. The azidomethylarylacetic acids are valuable intermediates in the preparation of aminomethylarylmethylpenicillins and aminomethylarylmethylcephalosporins.
通过铊(III)硝酸在甲醇或乙醇和某些酸的存在下氧化重排相应的叠氮甲基芳基甲基酮来制备Azidomethylarylacetic acids及其衍生物,以获得所需的叠氮甲基芳基乙酸甲酯或乙酯。必要时,通过水解所述酯来获得酸。Azidomethylarylacetic acids是制备氨甲基芳基甲基青霉素和氨甲基芳基甲基头孢菌素的有价值的中间体。