RIGID DINITROXIDE BIRADICAL COMPOUNDS USED AS IMPROVED POLARIZING AGENTS FOR DYNAMIC NUCLEAR POLARIZATION TECHNIQUES
申请人:UNIVERSITE D'AIX-MARSEILLE
公开号:US20160052934A1
公开(公告)日:2016-02-25
The invention concerns a dinitroxide biradical compound, in which the two nitroxide units are held by a rigid linkage, of general formula (I) in which—A is a carbon, an ammonium or a phosphonium, each of A
1
to A6 is selected separately from the group comprising a single bond, O, N, N(O), S, S(O), SO2, C(O), a (C1-C4) alkyl chain, Z1 and Z2 are chosen from RI and R2 in combination, such that there is always, in the combination, at least one R2 group that needs to be substituted by an R3 group, RI is an H, a (C6-C18) aryl or a (C3-C18) heteroaryl, R2 a (C1-C17) alkyl chain, a (C1-C17) alkenyl chain, a (C1-C17) alkynyl chain, a (C4-C17) cycloalkyl, a (C4-C17) heterocycloalkyl, a (C6-C18) aryl, a (C3-C18) heteroaryl, R3 is a (C1-C17) alkyl chain, a (C1-C17) alkenyl chain, a (C1-C17) alkynyl chain, a (C4-C17) cycloalkyl, a (C4-C17) heterocycloalkyl, a (C6-C18) aryl, a (C3-C18) heteroaryl, an ether —OR, an ester —C(O)O—R (in which R is any hydrocarbon radical), an azide, and in which, when Z1 and Z2 are combined together with the same carbon atom of the nitroxide ring to which they are bonded, they form a spirocycloalkyl or a spiroheterocycloalkyl substituted by R3.
该发明涉及一种二氮氧自由基化合物,其中两个互相连接的亚硝基单元由刚性连接保持,其通用式(I)中,A为碳,铵或磷銨,A1至A6中的每一个分别从包括单键,O,N,N(O),S,S(O),SO2,C(O),(C1-C4)烷基链的群体中选取,Z1和Z2从RI和R2中选择组合,使得在组合中始终至少有一个需要由R3基取代的R2基,RI为H,(C6-C18)芳基或(C3-C18)杂环芳基,R2为(C1-C17)烷基链,(C1-C17)烯基链,(C1-C17)炔基链,(C4-C17)环烷基,(C4-C17)杂环烷基,(C6-C18)芳基,(C3-C18)杂环芳基,R3为(C1-C17)烷基链,(C1-C17)烯基链,(C1-C17)炔基链,(C4-C17)环烷基,(C4-C17)杂环烷基,(C6-C18)芳基,(C3-C18)杂环芳基,醚-OR,酯-C(O)O—R(其中R为任何碳氢基),叠氮基,当Z1和Z2与它们连接的互相连接的亚硝基环的同一碳原子结合在一起时,它们形成一个由R3取代的螺环烷基或螺杂环烷基。