Vinylogous carbinolamine tumor inhibitors. 20. Comparison of the chemical reactivities and antineoplastic activities of .alpha.,.beta.-, .alpha.,.beta.'-, .beta.,.beta.'- and .alpha.,.alpha.'-bis[[[(2-propylamino)carbonyl]oxy]methyl] substituted pyrroles
摘要:
The bis[N-(2-propyl)carbamate] derivatives of 2,3-bis(hydroxymethyl)-4,5-diphenyl-1-methylpyrrole (4a), 3,4-bis-(hydroxymethyl)-2,5-diphenyl-1-methylpyrrole (4b), 2,4-bis(hydroxymethyl)-3,5-diphenyl-1-methylpyrrole (4c), and 2,5-bis(hydroxymethyl)-3,4-diphenyl-1-methylpyrrole (4d) were synthesized and the reactivities of the four compounds were compared using the model nucleophile 4-(p-nitrobenzyl)pyridine (NBP). No significant correlation was seen between NBP reactivity and either toxicity or antineoplastic activity in this series. Three compounds 4a, 4b, and 4c gave significant reproducible activity against P388 lymphocytic leukemia; the alpha,alpha'-bis(carbamate) 4d was inactive. The alpha,beta- and alpha,beta'-bis(carbamates) 4a and 4c were evaluated against a panel of mouse tumor homografts and human tumor xenografts implanted under the kidney capsule of mice.
Divergent Synthesis of Multisubstituted Unsymmetric Pyrroles and Pyrrolin-4-ones from Enamino Esters via Copper-Catalyzed Aerobic Dimerization
作者:Zhi-Wei Chen、Lei Zheng、Jin Liu
DOI:10.1002/ejoc.201900341
日期:2019.5.26
An efficient strategy for copper‐catalyzed synthesis of multisubstituted unsymmetric pyrroles and pyrrolin‐4‐ones, under oxygen atmosphere, from enamino esters through oxidative cyclization and 1,2‐aryl migration was developed. The additive plays a crucial role in this divergent transformation, and these transformations have different mechanisms (radical and non‐radical).