Total Synthesis of Fontanesine B and Its Isomer: Their Antiproliferative Activity against Human Colorectal Cancer Cells
作者:Takumi Abe、Tomoki Itoh、Masaru Terasaki
DOI:10.1002/hlca.201900116
日期:2019.7
A concise synthesis of pyrano[3,2‐e]indole alkaloid fontanesine B by a Fischer indolization is described. This key Fischer indolization starts with the pyran‐ring and alkene intact, facilitating potential synthetic applications. Furthermore, fontanesine B and its isomer were evaluated for in vitro antiproliferativeactivityagainsthuman colorectal cancer cells. The isomer of fontanesine B showed higher
描述了通过Fischer吲哚化反应合成吡喃并[3,2- e ]吲哚生物碱font烷B的方法。费舍尔关键的这种吲哚化反应从完整的吡喃环和烯烃开始,促进了潜在的合成应用。此外,评估了font丹碱B及其异构体对人结肠直肠癌细胞的体外抗增殖活性。ane丹宁B的异构体显示出比天然产物font丹宁B高的抗增殖活性(2)。
Uniting Amide Synthesis and Activation by P<sup>III</sup>/P<sup>V</sup>–Catalyzed Serial Condensation: Three-Component Assembly of 2-Amidopyridines
作者:Jeffrey M. Lipshultz、Alexander T. Radosevich
DOI:10.1021/jacs.1c07608
日期:2021.9.15
An organophosphorus (PIII/PV redox) catalyzed method for the three-component condensation of amines, carboxylic acids, and pyridine N-oxides to generate 2-amidopyridines via serial dehydration is reported. Whereas amide synthesis and functionalization usually occur under divergent reaction conditions, here a phosphetane catalyst (together with a mild bromenium oxidant and terminal hydrosilane reductant)
报道了一种有机磷(P III /P V氧化还原)催化胺、羧酸和吡啶N-氧化物三组分缩合通过连续脱水生成 2-氨基吡啶的方法。虽然酰胺合成和官能化通常发生在不同的反应条件下,但此处显示膦烷催化剂(与温和的溴氧化剂和末端氢硅烷还原剂一起)在自动串联催化级联中以化学选择性驱动这两个步骤。在单一有机催化活性中间体的作用下制备和官能化酰胺的能力为高效和模块化制备药物靶标提供了新的可能性。
[EN] COMPOUNDS FOR THE TREATMENT OF HEPATITIS C<br/>[FR] COMPOSÉS DESTINÉS AU TRAITEMENT DE L'HÉPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2012141704A1
公开(公告)日:2012-10-18
The disclosure provides compounds of formula I, including pharmaceutically acceptable salts, as well as compositions and methods of using the compounds. The compounds have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV.
Disclosed are compounds of general formula (I),
wherein the groups R
1
, R
2
, R
a
and R
b
have the meanings given in the claims and specification, the tautomers, racemates, enantiomers, diastereomers and the mixtures thereof, and optionally the pharmacologically acceptable acid addition salts, solvates and hydrates thereof, and processes for preparing these thiazolyl-dihydro-indazoles and the use thereof as pharmaceutical compositions.