申请人:Xoma Corporation
公开号:US05093475A1
公开(公告)日:1992-03-03
Novel compounds and methods for the formation of disulfide linkages are presented. The novel compounds employed are substituted 2-iminothiolane hydrohalide linking agents of the following formula (I): ##STR1## wherein, X is halogen; R.sub.1 is COOR.sub.5 ; halogen; nitro; unsubstituted or halogenated C.sub.1-8 alkyl; unsubstituted or halogenated C.sub.1-8 alkoxy; unsubstituted or halogenated C.sub.2-8 alkenyl; unsubstituted or halogenated C.sub.2-8 alkynyl; unsubstituted C.sub.3-8 cycloalkyl; unsubstituted aryl; aryl substituted with 1 to 3 substituents selected from halogen, amino, unsubstituted or halogenated C.sub.1-8 alkyl, or unsubstituted or halogenated C.sub.1-8 alkoxy; unsubstituted heterocycle; or heterocycle substituted with 1 to 3 substituents selected from amino, halogen, unsubstituted or halogenated C.sub.1-8 alkyl, or unsubstituted or halogenated C.sub.1-8 alkoxy; each of R.sub.2, R.sub.3 and R.sub.4 is independently hydrogen or selected from the values of R.sub.1 ; or R.sub.1 and R.sub.2 together form a C.sub.2-5 alkylene bridge, unsubstituted or substituted with one to five C.sub.1-4 alkyl groups; or R.sub.1 or R.sub.2 together with R.sub.3 form a C.sub.1-5 alkylene bridge, unsubstituted or substituted with one to five C.sub.1-4 alkyl groups; and R.sub.5 is hydrogen or C.sub.1-8 alkyl. Also included in the invention are methods for covalently linking two species, which methods comprise reacting one or both of the two species with a crosslinking agent of the above formula (I) and mixing the two species together. The resulting conjugated species containing the linking group are also included in the invention. Further included in the invention is the use of a quenching agent which allows direct measurement of the reaction of 2-iminothiolanes with nucleophilic groups.
本发明提供了新型化合物和形成二硫键的方法。所采用的新型化合物是以下式(I)的取代2-亚硫酰胺烷氢卤素连接剂:##STR1## 其中,X是卤素;R.sub.1是COOR.sub.5;卤素;硝基;未取代或卤代的C.sub.1-8烷基;未取代或卤代的C.sub.1-8烷氧基;未取代或卤代的C.sub.2-8烯基;未取代或卤代的C.sub.2-8炔基;未取代的C.sub.3-8环烷基;未取代的芳基;芳基上选择1至3个取代基,所述取代基是卤素、氨基、未取代或卤代的C.sub.1-8烷基或未取代或卤代的C.sub.1-8烷氧基;未取代的杂环;或杂环上选择1至3个取代基,所述取代基是氨基、卤素、未取代或卤代的C.sub.1-8烷基或未取代或卤代的C.sub.1-8烷氧基;R.sub.2、R.sub.3和R.sub.4中的每一个独立地是氢或从R.sub.1的值中选择的值;或者R.sub.1和R.sub.2一起形成一个C.sub.2-5烷基桥,未取代或取代有1至5个C.sub.1-4烷基;或者R.sub.1或R.sub.2与R.sub.3一起形成一个C.sub.1-5烷基桥,未取代或取代有1至5个C.sub.1-4烷基;而R.sub.5是氢或C.sub.1-8烷基。本发明还包括将两个物种共价连接的方法,该方法包括将两个物种中的一个或两个与上述式(I)的交联剂反应并混合两个物种。所得到的含有连接基的共轭物种也包括在本发明中。本发明还包括使用抑制剂,该抑制剂允许直接测量2-亚硫酰胺烷与亲核基团的反应。