2,3′-Bis(1′H-indole) heterocycles: New p53/MDM2/MDMX antagonists
摘要:
The protein-protein interaction of p53 and MDM2/X is a promising non genotoxic anticancer target. A rapid and efficient methodology was developed to synthesize the 2,3'-bis(1'H-indole) heterocyclic scaffold 2 as ester, acid and amide derivatives. Their binding affinity with MDM2 was evaluated using both fluorescence polarization (FP) assay and HSQC experiments, indicating good inhibition and a perfect starting point for further optimizations. (C) 2015 Elsevier Ltd. All rights reserved.
A Convenient Synthesis of 1-Alkyl-1-phenylhydrazines fromN-Aminophthalimide
摘要:
N-Alkylaminophthalimides were synthesized by condensation of N-aminophthalimide with aldehydes, and subsequent reduction of the intermediate with pyridine-borane in acetic acid. N-Phenylation and removal of the phthalimide group gave 1-alkyl-1-phenylhydrazines in high yield.
Reductive Hydrazination with Trichlorosilane: A Method for the Preparation of 1,1-Disubstituted Hydrazines
作者:Tao Wang、Xiao Di、Chao Wang、Li Zhou、Jian Sun
DOI:10.1021/acs.orglett.6b00675
日期:2016.4.15
and facile method has been developed to prepare 1,1-disubstituted hydrazines via Lewis base promoted direct reductive hydrazination. Under the catalysis of hexamethylphosphoramide (HMPA) and N,N-dimethylacetamide (DMAc), respectively, various ketones and aldehydes could react with phenylhdrazines to prepare 1,1-disubstituted hydrazines with good to high yields.
By treating with secondary amines chloraceto-o-toluidide was converted to aminoaceto-o-toluidides, which were cyclized on heating with sodium amide to give 2-aminomethylindoles. N-Benzyl-N-(N, N-dimethylaminoaceto)-o-toluidide on treatment with sodium amide was converted to 1-benzyl-2-N, N-dimethylaminomethylindole. N-Benzyl-(or N-p-chlorobenzyl-) N-phenylhydrazine was treated with aminoacetones in the presence of a trace of acetic acid to convert the corresponding aminoacetone N-benzyl-(or N-p-chlorobenzyl-) N-phenylhydrazones. The indole cyclization of the latter gave 1-benzyl-2-methyl-3-aminoindoles. On treatment of aminoacetones with phenylhydrazine derivatives in ethyl alcohol, methylglyoxal diphenylhydrazone derivatives were obtained.
We present a PPh3/DDQ-mediated regiospecific selectiveN-functionalization of arylhydrazines with primary benzylic alcohols and aryl carboxylic acids for the synthesis of N1-benzyl arylhydrazines and N2-acyl arylhydrazines, respectively. This metal- and base-free approach features very short reaction times (about 10 min), broad substrate scope, good functional group tolerance, and mild reaction conditions