2a-d and 4a-i with triethylorthoesters or iminoethers. Ether cleavage with BBr(3) yielded the (4R,5S)/(4S,5R)-4,5-bis(4-hydroxyphenyl)-2-imidazolines 3a-d and 5a-i. The N-alkylation and N,N'-dialkylation of 2b, employed for obtaining 7a-c and 9a-c, were performed prior to the ether cleavage with alkyl iodine in dry THF. By use of HPLC, the influence of the substitution patterns in the aromatic rings and
带有2,2'-H(3a),2,2'-Cl(3b),2,2的(4R,5S)/(4S,5R)-4,5-双(
4-羟苯基)-
2-咪唑啉芳环中的',6-Cl(3c)和2,2'-F(3d)取代基经C2-烷基化(5a-i),N-烷基化(7,7a-c)和N,N' -二烷基化(9a-c)。合成从非对映体纯的(1R,2S)/(1S,2R)-1,2-二
氨基-1,2-双(4-
甲氧基苯基)
乙烷1a-d开始,将其环化为
咪唑啉2a-d和4a-i与三乙基原酸酯或亚
氨基醚。用BBr(3)裂解醚得到(4R,5S)/(4S,5R)-4,5-双(
4-羟基苯基)-
2-咪唑啉3a-d和5a-i。用于获得7a-c和9a-c的2b的N-烷基化和N,N'-二烷基化反应是在用烷基
碘在无
水THF中裂解之前进行的。通过HPLC,在体外条件下,研究了碳原子数为2或N的芳香环和烷基链上的取代方式对
咪唑啉水解速率的影响。似乎只有具有C 2-或N-烷基