Convenient synthesis of 2,5-disubstituted thiophene from 1,6-dioxo-2,4-diene
作者:Chi Wi Ong、Chong Ming Chen、Long Fu Wang、Po Chuen Shieh
DOI:10.1016/s0040-4039(98)02094-2
日期:1998.12
Reaction of 1,6-dioxo-2,4-diene with P2S5 and Lawesson'sreagent affords the 2,5-disubstituted thiophene. This reaction can take place regioselectively in the presence of BF3-etherate catalysis, useful for the synthesis of arylthiophene.
1,6-二氧代-2,4-二烯与P 2 S 5和Lawesson试剂反应,得到2,5-二取代的噻吩。该反应可以在BF 3-醚酸酯催化的存在下区域选择性地发生,这对于芳基噻吩的合成是有用的。
Pyrrolizine and Indolizine Derivatives from 1,6-Dioxo-2,4-diene by Inter- and Intramolecular Ring Closure
作者:Chi-Wi Ong、Ming Chih Lai、Jing Jyh Jan、Yu An Chang
DOI:10.3987/com-02-9494
日期:——
A variety of 1-amino-alkyl esters and nitriles react with 1,6-dioxo-2,4-diene to give pyrrole derivatives in good yield. Mild basic conditions facilitate the further intramoleular Dieckmann or Thorpe like condensation giving pyrrolizine and indolizine derivatives. These reactions provide simple, two step sequence to pyrrolizine and indolizine derivatives with control of product dictated by the base used for the condensation reaction.
Novel Cyclopentenone Synthesis by Base-Catalyzed Cyclization of Dienediones
作者:Chi Wi Ong、Chong Ming Chen、Shyh Shian Juang
DOI:10.1021/jo00104a059
日期:1994.12
Dienyl diketones as anticancer agents: synthesis and biological evaluation of some aromatic derivatives
作者:Po Chuen Shieh、Chi Wi Ong
DOI:10.1016/s0960-894x(99)00190-0
日期:1999.5
Aiming to develop anticancer agents, synthesis and in vitro evaluation of aromatic dienyl diketone derivatives were carried out. All the aromatic (Z,E)-dienyl diketones synthesized exhibit strong in vitro inhibition of tumor cell growth against Colon cell line. (C) 1999 Elsevier Science Ltd. All rights reserved.
Efficient Synthesis of Pyrroles from Chemoselective Addition of Primary Amines to 1,6-Dioxo-2,4-dienes
作者:Chi Wi Ong、Chong Meng Chen、Long Hu Wang、Jiing Jyh Jan、Po Chuen Shieh