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 Flavanones and Flavones Related to Podophyllotoxin.
作者:Anne GONZALEZ DE PEREDO、Stephane LEONCE、Claude MONNERET、Daniel DAUZONNE
DOI:10.1248/cpb.46.79
日期:——
A series of novel flavonoids comprising structural elements present in the antineoplastic agents podophyllotoxin and etoposide was synthesized. These oxygen-containing analogues of antiproliferative quinolones moderate cytotoxicity towards L1210 and HT-29 cell lines.
A convenient procedure for the preparation of 5,6-dihydro-6-nitro-5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones and 5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones
作者:Daniel Dauzonne、Anne Adam-Launay
DOI:10.1016/s0040-4020(01)92249-5
日期:1992.4
Z-(2-chloro-2-nitroethenyl)benzenes with 4,6-dihydroxypyrimidine provides 5,6-dihydro-6-nitro-5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones at room temperature. Involving the same starting materials, but using DBU in refluxing ethanol instead of triethylamine, the so far unknown 5-phenylfuro[2,3-d]pyrimidin-4(3H-ones are obtained
Z-(2-氯-2-硝基乙烯基)苯与4,6-二羟基嘧啶的三乙胺促进的缩合反应提供5,6-二氢-6-硝基-5-苯基呋喃[2,3-d]嘧啶-4(3 H)-在室温下一个。使用相同的起始原料,但在回流的乙醇中使用DBU代替三乙胺,获得了迄今未知的5-苯基呋喃[2,3-d]嘧啶-4(3 H -ones)
(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