(2-chloro-2-nitroethenyl)benzenes as synthons: a general method for the preparation of 2,3-dihydro- 2-nitro-3-phenyl-4H-furo [3,2-c] [1]benzopyran-4-ones and 3-phenyl-4H-furo[3,2-c][1]benzopyran-4-ones
An Expedient Synthesis of β-Chloro-β-nitroolefin Derivatives
摘要:
beta-Chloro-beta-nitroolefin derivatives 2 were prepared from the reaction of beta-nitroolefins 1 with HCl/DMF/Oxone system in moderate to good yields.
A Convenient Synthesis of 3-Chloro-3,4-dihydro-4-hydroxy-3-nitro-2-phenyl-2<i>H</i>-1-benzopyrans
作者:Daniel Dauzonne、Pierre Demerseman
DOI:10.1055/s-1990-26791
日期:——
The novel title compounds 5 are prepared by a simple and efficient two-step procedure starting from substituted benzaldehydes 1. A convenient route to the (2-chloro-2-nitroethenyl)benzenes 3 required as intermediates in the synthesis is reported.
cell surface aminopeptidase N (APN/CD13), overexpressed in tumor cells, plays a critical role in angiogenesis. However, potent, selective, and, particularly, noncytotoxic inhibitors ot this protein are lacking, and the present work was undertaken with the aim of developing a new generation of noncytotoxic inhibitors that bind to APN/CD13. In this context, we have synthesized a series of novel flavone-8-acetic
the dual electrophilic properties of (2-chloro-2-nitroethenyl)benzenes in a one-pot, formal [3+2] cycloaddition. Using a base (DBU), the desired trisubstituted heterocycles were formed rapidly (10–30 min) in good to excellent yields (51–92 %), and this versatile, metal-free methodology was applied to the synthesis of 2-acyl- and 2-carboalkoxyfurans and furan-2-carboxamides. Additionally, by using 2-ketophosphonate
Synthesis and Biological Evaluation of 5-Arylfuro(2,3-d)pyrimidines as Novel Dihydrofolate Reductase Inhibitors.
作者:Farid WAHID、Claude MONNERET、Daniel DAUZONNE
DOI:10.1248/cpb.47.156
日期:——
A series of about fifty novel 5-arylfuro[2,3-d]pyrimidine derivatives were synthesized as potential inhibitors of dihydrofolatereductase (DHFR) arising from different species. Weak enzyme inhibition was observed for most of the compounds, with only a few reaching IC50 values less than 30 microM. With regards to antibacterial and anti-malarial potency, only seven compounds showed a modest in vitro
An expedient synthesis of a new family of configurationally stable dioxa[6]helicenes was established using a sequential helicoselective organocatalyzed heteroannulation/eliminative aromatization via enantioenriched fused 2-nitro dihydrofurans featuring both central and helical chiralities. Starting from simple achiral precursors, a broad range of these previously unknown chiral heterocyclic scaffolds