三唑/金(TA-Au)和Cu(OTf)2的组合被认为是促进分子内氢硼化合成六元环胺-硼烷的最佳催化体系。通过催化剂控制和顺序稀释,获得了极高的收率(高达95%)和区域选择性(5-exo vs. 6-endo)。获得了良好的官能团耐受性,因此可以制备高度官能化的环胺-硼烷底物,而这是其他方法无法实现的。氘标记研究支持在金活化炔烃中加入氢化物并随后形成C-B键。
[EN] NEW COMPOUNDS FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES<br/>[FR] NOUVEAUX COMPOSÉS POUR LE TRAITEMENT DE MALADIES NEURODÉGÉNÉRATIVES
申请人:UNIV LEUVEN KATH
公开号:WO2012080221A1
公开(公告)日:2012-06-21
This invention provides novel compounds and the novel compounds for use as a medicine, more in particular for the prevention or treatment of neurodegenerative disorders, more specifically certain neurological disorders, such as disorders collectively known as tauopathies, and disorders characterised by cytotoxic α-synuclein amyloidogenesis. The present invention also relates to the use of said novel compounds for the manufacture of medicaments useful for treating such neurodegenerative disorders. The present invention further relates to pharmaceutical compositions including said novel compounds and to methods for the preparation of said novel compounds. The compounds have the formula (A1) wherein R1, R2, R4, R6, E, n, Y1, Y2, Y3, Y4, Y5, L, B, R8, and m are as defined in the claims.
NEW COMPOUNDS FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES
申请人:Griffioen Gerard
公开号:US20130274260A1
公开(公告)日:2013-10-17
This invention provides novel compounds and the novel compounds for use as a medicine, more in particular for the prevention or treatment of neurodegenerative disorders, more specifically certain neurological disorders, such as disorders collectively known as tauopathies, and disorders characterised by cytotoxic α-synuclein amyloidogenesis. The present invention also relates to the use of said novel compounds for the manufacture of medicaments useful for treating such neurodegenerative disorders. The present invention further relates to pharmaceutical compositions including said novel compounds and to methods for the preparation of said novel compounds. The compounds have the formula (A1) wherein R
1
, R
2
, R
4
, R
6
, E, n, Y
1
, Y
2
, Y
3
, Y
4
, Y
5
, L, B, R
8
, and m are as defined in the claims.
作者:Jonathan A. Davies、Freya M. Bull、Paul D. Walker、Angus N. M. Weir、Rob Lavigne、Joleen Masschelein、Thomas J. Simpson、Paul R. Race、Matthew P. Crump、Christine L. Willis
DOI:10.1021/acs.orglett.0c02190
日期:2020.8.21
The kalimantacins make up a family of hybrid polyketide-nonribosomal peptide-derived naturalproducts that display potent and selective antibiotic activity against multidrug resistant strains of Staphylococcus aureus. Herein, we report the first total synthesis of kalimantacin A, in which three fragments are prepared and then united via Sonogashira and amide couplings. The enantioselective synthetic
Kalimantacins 组成了一个混合聚酮化合物-非核糖体肽衍生的天然产物家族,这些产物对金黄色葡萄球菌的多重耐药菌株显示出有效和选择性的抗生素活性。在此,我们报告了卡里曼泰星 A 的首次全合成,其中制备了三个片段,然后通过 Sonogashira 和酰胺偶联进行了结合。对映选择性合成方法是收敛的,为结构-活性关系研究和临床评估开辟了进一步的卡里曼泰星和类似物的路线。
Metal promoted cyclization. 18. Novel cyclialkylation reactions of (.omega.-halo-1-alkenyl)metal derivatives. Synthetic scope and mechanism
作者:Eiichi. Negishi、Larry D. Boardman、Hiroyuki. Sawada、Vahid. Bagheri、A. Timothy. Stoll、James M. Tour、Cynthia L. Rand
DOI:10.1021/ja00224a025
日期:1988.8
Cyclisation d'(ω-halogenoalcene-1yl) M et d'([ω-halogeno trimethylsilyl-1] alcene-1yl) M en cyclenes (M=aluminium, zinc, zirconium, ou silicium)
环化 d'(ω-halogenoalcene-1yl) M et d'([ω-halogeno trimethylsilyl-1] alcene-1yl) M 环烯(M = 铝、锌、锆、硅)
Enantioselective Total Synthesis of (+)- and (−)-Nigellamine A<sub>2</sub>
作者:Jianwei Bian、Matthew Van Wingerden、Joseph M. Ready
DOI:10.1021/ja061559n
日期:2006.6.1
The nigellamine alkaloids are dolabellanediterpenes displaying potent lipid metabolism-promoting activity. Total synthesis of (+)- and (-)-nigellamine A2 has been accomplished. Absolute stereochemistry of synthetic nigellamine A2 was established through an intramolecular asymmetric allylic alkylation using a Pd(phosphinooxazoline) catalyst. Other notable transformations include a radical alkynylation
奈杰明生物碱是多标签烷二萜,显示出有效的脂质代谢促进活性。(+)-和(-)-nigelamine A2的全合成已经完成。合成奈杰胺 A2 的绝对立体化学是通过使用 Pd(膦基恶唑啉) 催化剂的分子内不对称烯丙基烷基化建立的。其他值得注意的转化包括自由基炔基化、非对映选择性 Nozaki-Hiyama-Kishi 环化以及区域和立体选择性催化环氧化。在光学活性中间体的 X 射线晶体学分析的基础上,我们已经确认了天然产物的指定绝对立体化学。此处概述的合成序列的微小修改应提供对其他尼杰拉敏生物碱的访问。