Synthesis and mechanistic studies of a mitomycin dimer containing an eight-membered cyclic disulfide
作者:Hyun Jung Park、Jae Jin Kim、Hyoung Rae Kim、Eun Kyung Lee、Eun Sook Kim、Choon Sik Jeong、Aree Moon、Sang Hyup Lee
DOI:10.1016/j.bmc.2011.05.020
日期:2011.7
intermediate, cyclic disulfide (11), along with the reference diol mitomycin 7-N,7′-N′-(2″,7″-dihydroxy-1″,8″-octanediyl)bismitomycin C (23) which does not contain the disulfide unit. We found that 8 underwent significantly enhanced nucleophilic activation in the presence of Et3P compared with 23, and that the disulfide unit in 8 played a key role for the nucleophilic activation. Based on these findings
二聚体DNA烷基化剂引起了极大的兴趣,因为与它们的单体剂相比,预计这些化合物可提供至少两个反应位点,因此可产生更高水平的DNA链间交联(DNA ISC)加合物。我们报告了一种新型丝裂霉素二聚体7- N,7'- N '-(1“,2” -dithiocanyl-3“,8”-二甲烯基)bismitomycin C(8)的合成和机理研究,元环二硫化物。丝裂霉素需要事先激活(即转化为良好的亲电试剂)以进行DNA内含,因此8旨在进行容易的亲核激活并产生更高水平的DNA ISC。该功能的核心是8中的环状二硫键。预期适当的亲核试剂对二硫键的裂解将连续产生两个硫醇,这些硫醇可能通过分子内环化成奎宁环而触发二聚体中两个丝裂霉素环的活化。化合物8从丝裂霉素A(合成1)和所述关键中间体,环状二硫化物(11),与所述参考二醇丝裂霉素沿7- Ñ,7'- Ñ ' - (2“,7” -二羟基- 1“,8 ″辛烷二基)双丝