Synthesis and biological evaluation of 9-(5′,5′-difluoro-5′-phosphonopentyl)guanine derivatives for PNP-inhibitors
摘要:
9-(5',5'-Difluoro-5'-phosphonopentyl)guanine (DFPP-G) and its hypoxanthine analogue (DFPP-H) were modified by introducing a methyl group to all possible positions of the linker connecting a purine and difluoromethylenephosphonic acid moiety to evaluate the effects of the methyl group on inhibition against purine nucleoside phosphorylase. The methyl group on the linker affected the inhibition in a positional-dependent manner. Inhibitory potency of alpha-methyl and beta-methyl -substituted analogues of DFPP-H increased by about 600- to 1000-fold upon converting to cyclopropane nucleotide analogue (+/-)-4. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of 9-(5′,5′-difluoro-5′-phosphonopentyl)guanine derivatives for PNP-inhibitors
摘要:
9-(5',5'-Difluoro-5'-phosphonopentyl)guanine (DFPP-G) and its hypoxanthine analogue (DFPP-H) were modified by introducing a methyl group to all possible positions of the linker connecting a purine and difluoromethylenephosphonic acid moiety to evaluate the effects of the methyl group on inhibition against purine nucleoside phosphorylase. The methyl group on the linker affected the inhibition in a positional-dependent manner. Inhibitory potency of alpha-methyl and beta-methyl -substituted analogues of DFPP-H increased by about 600- to 1000-fold upon converting to cyclopropane nucleotide analogue (+/-)-4. (c) 2005 Elsevier Ltd. All rights reserved.
Hydrophosphonodifluoromethylation of Alkenes via Thiyl-Radical/Photoredox Catalysis
作者:Wenhao Huang、Jingzhi Chen、Daocheng Hong、Wenxin Chen、Xu Cheng、Yuxi Tian、Guigen Li
DOI:10.1021/acs.joc.7b02354
日期:2018.1.19
Visible-light-induced catalytic hydrophosphonodifluoromethylation of mono- and disubstituted alkenes using bromodifluoromethanephosphonate with a Hantzsch ester as the terminal reductant is reported. The combination of thiyl-radical catalysis with photoredoxcatalysis is important for achieving good chemoselectivity and high yields.