4型环核苷酸磷酸二酯酶(PDE4)控制细胞内环磷酸腺苷(cAMP)的水平,作为呼吸系统疾病抗炎治疗的合适靶点引起了科学界的关注。这项工作描述了作为潜在 PDE4 抑制剂的带有吲哚部分的哒嗪酮衍生物的开发和表征,以及它们作为抗炎剂的评估。在这些衍生物中,4-(5-methoxy-1 H -indol-3-yl)-6-methylpyridazin-3(2 H )-one 具有良好的活性和对 PDE4B 同工酶的选择性,并且能够调节有效的促炎性物质人类原代巨噬细胞产生细胞因子和趋化因子。
[EN] CONCISE PROCESS FOR PREPARING 3-PYRROLIDINE CARBOXYLIC ACID DERIVATIVES<br/>[FR] PROCÉDÉ CONCIS POUR LA PRÉPARATION DE DÉRIVÉS D'ACIDE 3-PYRROLIDINE CARBOXYLIQUE
申请人:OKINAWA INST SCIENCE & TECH SCHOOL CORP
公开号:WO2018025295A1
公开(公告)日:2018-02-08
The present invention relates to a process for preparing 3-pyrrolidine carboxylic acid derivatives, and particularly a simple process for preparing 5-substituted 3-pyrrolidine carboxylic acid derivatives. In addition, the present invention relates to a novel pyrrolidine carboxylic acid derivative, its manufacture, pharmaceutical compositions containing it and its use as a catalyst.
Chiral N-heterocyclic carbene-catalyzed generation of ester enolate equivalents from α,β-unsaturated aldehydes for enantioselective Diels–Alder reactions
作者:Juthanat Kaeobamrung、Marisa C. Kozlowski、Jeffrey W. Bode
DOI:10.1073/pnas.1007469107
日期:2010.11.30
The catalytic generation of chiral ester enolate equivalents from alpha,beta-unsaturated aldehydes with chiral N-hetereocyclic carbene catalysts makes possible highly enantioselective hetero-Diels-Alder reactions. The reactions proceed under simple, mild conditions with both aliphatic and aromatic substituted enals as substrates. Previous attempts to employ these starting materials as enolate precursors
Cycloaddition reactions of silyloxyacetylenes with ketenes: synthesis of cyclobutenones, resorcinols, and .DELTA.-6-tetrahydrocannabinol
作者:Conrad J. Kowalski、G. Sankar. Lal
DOI:10.1021/ja00219a073
日期:1988.5
La cycloaddition du cetene avec des composes acetyleniques donne des cyclobutene-2ones. Ces dernieres reagissent avec des composes acetyleniques pour donner des resorcinols et le tetrahydro-6a,7,10,10a cannabinol
La cycloaddition du cetene avec des composes acetyleniques donne des cyclobutene-2ones。Ces dernieres reagissent avec des composes acetyleniques pour donner des resorcinols et le tetrahydro-6a,7,10,10a 大麻
Catalytic Synthesis of 1<i>H</i>-2-Benzoxocins: Cobalt(III)-Carbene Radical Approach to 8-Membered Heterocyclic Enol Ethers
作者:Minghui Zhou、Lukas A. Wolzak、Zirui Li、Felix J. de Zwart、Simon Mathew、Bas de Bruin
DOI:10.1021/jacs.1c10927
日期:2021.12.8
several opportunities for the synthesis of new bioactive compounds. The reactions are shown to proceed via cobalt(III)-carbene radical intermediates, which are involved in intramolecular hydrogen transfer (HAT) from the allylic position to the carbene radical, followed by a near-barrierless radical rebound step in the coordination sphere of cobalt. The proposed mechanism is supported by experimental observations
使用顺磁性钴(II)卟啉催化剂[Co II (TPP)](TPP=四苯基卟啉)对邻烯丙基羰基-芳基N-芳基磺酰腙进行金属自由基活化,为合成新型8元杂环化合物提供了一种有效且强大的方法烯醇醚。该合成方案通用且实用,能够以高产率合成多种独特的 1 H -2-苯并氧辛。催化环化反应具有优异的化学选择性,具有较高的官能团耐受性,并为合成新的生物活性化合物提供了多种机会。该反应通过钴(III)-卡宾自由基中间体进行,该中间体参与从烯丙基位置到卡宾自由基的分子内氢转移(HAT),然后在钴的配位层中进行近无障碍的自由基反弹步骤。所提出的机制得到了实验观察、密度泛函理论(DFT)计算和自旋捕获实验的支持。
Pot and time economies in the total synthesis of Corey lactone
作者:Nariyoshi Umekubo、Yurina Suga、Yujiro Hayashi
DOI:10.1039/c9sc05824a
日期:——
The Corey lactone is a highly versatile intermediate for the synthesis of a variety of prostaglandin hormones that natively control a multitude of important physiological processes. Starting from commercially available compounds, we herein disclose a time-economical, one-pot enantioselective preparation of the Corey lactone by virtue of a new diphenylprolinol silyl ether-mediated domino Michael/Michael