[EN] PRODRUGS OF AZACITIDINE 5'-PHOSPHATE<br/>[FR] PROMÉDICAMENTS DE 5'-PHOSPHATE D'AZACITIDINE
申请人:SYNDAX PHARMACEUTICALS INC
公开号:WO2011153374A1
公开(公告)日:2011-12-08
The present disclosure relates to analogs or derivatives of azacitidine with improved pharmaceutical properties and methods for the treatment of proliferative disease utilizing said analogs or derivatives.
Synergistic Brønsted/Lewis acid catalyzed aromatic alkylation with unactivated tertiary alcohols or di-<i>tert</i>-butylperoxide to synthesize quaternary carbon centers
作者:Aaron Pan、Maja Chojnacka、Robert Crowley、Lucas Göttemann、Brandon E. Haines、Kevin G. M. Kou
DOI:10.1039/d1sc06422c
日期:——
Dual Brønsted/Lewis acid catalysis involving environmentally benign, readily accessible protic acid and iron promotes site-selective tert-butylation of electron-rich arenes using di-tert-butylperoxide. This transformation inspired the development of a synergistic Brønsted/Lewis acidcatalyzed aromatic alkylation that fills a gap in the Friedel–Crafts reaction literature by employing unactivated tertiary
A large number of cycloSal-nucleotide triesters 1-49 have been studied concerning their ability to inhibit cholinesterases of different origins as well as to inhibit HIV replication in cell culture. It was shown that none of the triesters showed inhibitory effects against human acetylcholinesterase (AChE; isolated enzyme) as well as against AChE from beef erythrocytes and calf serum. In contrast, inhibition of butyrylcholinesterase (BChE) has been observed for some triesters in human and mouse serum. cycloSal pronucleotides showed strong competitive inhibition with respect to the substrate acetylcholine chloride (K-i/K-m: similar to2 x 10(-5)) and acted by time-dependent irreversible inhibition of the human serum BChE. Detailed studies demonstrated that the inhibitory effect against BChE is dependent on the nucleoside analogue, the substitution pattern of the cycloSal-moiety, and particularly on the stereochemistry at the phosphorus atom. Structural requirements to avoid the inhibition of BChE by cycloSal-nucleotide triesters have been elucidated in the reported study.
Highly Substituted Aromatics. The Synthesis and Nuclear Magnetic Resonance Spectrum of 2,4,6-Tri-t-butyl-3-fluorophenol<sup>1</sup>