申请人:ELI LILLY AND COMPANY
公开号:EP0060120A1
公开(公告)日:1982-09-15
A process for preparing 4-haloazetidinones of the formu-
which comprises reacting in an inert solvent at a temperature between about -20°C. and about 45°C. a 4-sulfino- azetidinone of the formula
with at least one molar equivalent of a positive halogen reagent, where in the above formulas M is hydrogen, sodium or potassium, X is chloro, bromo, or iodo; R is a carboxy-protecting group; and R, is an acylamido or diacylamido group useful as intermediates for the preparation of β-lactam antibiotics.
一种制备式-4-卤代氮杂环丁酮的工艺
式的 4-氨基磺氮杂环丁酮与至少一种摩尔当量的正卤素试剂反应。
式中 M 为氢、钠或钾,X 为氯、溴或碘;R 为羧基保护基团;R 为酰氨基或二酰基氨基,可用作制备 β-内酰胺类抗生素的中间体。