An efficient catalytic deprotection of thioacetals employing bismuth triflate: synthesis of pyrrolo[2,1-c] [1,4] benzodiazepines
作者:Ahmed Kamal、P.S.M.M Reddy、D Rajasekhar Reddy
DOI:10.1016/s0040-4039(03)00437-4
日期:2003.3
A simple and efficientdeprotection of thioacetals has been achieved by employing bismuthtriflate. This method has been effectively employed in the preparation of DNA-binding pyrrolo[2,1-c] [1,4]benzodiazepine and its dimers.
通过使用三氟甲磺酸铋已经实现了对硫缩醛的简单有效的脱保护。该方法已有效地用于制备结合DNA的吡咯并[2,1- c ] [1,4]苯并二氮杂及其二聚体。
Facile and efficient synthesis of the dimers of DC-81 antitumour antibiotics
作者:Ahmed Kamal、N. Venugopal Rao
DOI:10.1016/0040-4039(95)00744-w
日期:1995.6
We report an improved, economical and versatile route to the dimers of DC-81 anti-tumour antibiotics. Particularly, the protection and deprotection steps in its synthesis and in the preparation of its precursors have been avoided. There is a significant improvement in the overall yields.
Effect of linker length on DNA-binding affinity, cross-linking efficiency and cytotoxicity of C8-linked pyrrolobenzodiazepine dimers
作者:D. Subhas Bose、Andrew S. Thompson、Melissa Smellie、Mark D. Berardini、John A. Hartley、Terence C. Jenkins、Stephen Neidle、David E. Thurston
DOI:10.1039/c39920001518
日期:——
An efficient synthesis of a homologous series of C8-linked pyrrolobenzodiazepine dimers is reported; compounds with an odd number of methylenes (n= 3 or 5) in the linker show a higher affinity for DNA, enhanced cross-linking efficiency, and are more cytotoxic compared with compounds with either n= 4 or 6.
Synthesis of Sequence-Selective C8-Linked Pyrrolo[2,1-<i>c</i>][1,4]benzodiazepine DNA Interstrand Cross-Linking Agents
作者:David E. Thurston、D. Subhas Bose、Andrew S. Thompson、Philip W. Howard、Alberto Leoni、Stephen J. Croker、Terrence C. Jenkins、Stephen Neidle、John A. Hartley、Laurence H. Hurley
DOI:10.1021/jo951631s
日期:1996.11.15
An efficient convergent synthesis of a homologous series of C8-linked pyrrolobenzodiazepine dimers with remarkable DNAinterstrandcross-linking activity and potent in vitro cytotoxicity is reported. The "amino thioacetal" cyclization procedure was used to produce the electrophilic DNA-interactive N10-C11 imine moiety during the final synthetic step. In order to construct the key A-ring fragments (9a-d)