螺环素 A、C 和 D 是已在海洋真菌菌株 LL-37H248 中鉴定的代谢物。它们独特的多环结构和有趣的生物活性使它们成为合成社区的有吸引力的目标。基于 5-取代萘醌的可扩展对映选择性环氧化、氧化/螺酮缩酮级联、苯酚单元的邻位选择性氯化和肟酯导向的乙酰氧基化、(-)-螺环素 A 和 C 的对映选择性全合成以及已经实现了 (-)-spiroxin D 的首次全合成。
Novel 8-Substituted Dipyridodiazepinone Inhibitors with a Broad-Spectrum of Activity against HIV-1 Strains Resistant to Non-nucleoside Reverse Transcriptase Inhibitors
摘要:
A series of novel 8-substituted dipyridodiazepinone-based inhibitors were investigated for their antiviral activity against wild type human immunodeficiency virus (HIV-1) and the clinically prevalent K103N/Y181C mutant virus. Our efforts have resulted in a series of benzoic acid analogues that are potent inhibitors of HIV-1 replication against a panel of HIV-1 strains resistant to non-nucleoside reverse transcriptase inhibitors (NNRTIS). Furthermore, the combination of good antiviral potency, a broad spectrum of activity, and an excellent pharmacokinetic profile provides strong justification for the further development of compound 7 as a potential treatment for wild type and NNRTI-resistant HIV-1 infection.
Synthesis of Difluorinated Dihydrobenzo[
<i>de</i>
]chromenes via Rh(III)‐Catalysed C‐H Couplings of 1‐Naphthols with
<i>Gem</i>
‐Difluoromethylene Alkynes
作者:Liping Li、Xiuhua Zhong、Jiali Xu、Hui Gao、Zhi Zhou、Wei Yi
DOI:10.1002/adsc.202001475
日期:2021.3.2
difluorinated dihydrobenzo[de]chromenes with broad substrate/functional group compatibility and good regio‐/chemoselectivity and in an atom‐economic manner. The unique fluorine effects account for the unconventional reaction path involvingintramolecular 1,3‐hydrogen migration process to afford the exo‐methylene fragment.
已经实现了1-萘酚与宝石-二氟亚甲基炔烃的Rh(III)催化的CH偶联,可直接构建具有广泛的底物/官能团相容性和良好的区域/化学选择性的二氟化二氢苯并[ de ]苯二甲基苯。原子经济方式。独特的氟效应解释了涉及分子内1,3-氢迁移过程的非常规反应路径,从而提供了外亚甲基片段。
Main-chain donor-acceptor polyhydrazone mediated adsorption of an anionic dye from contaminated water
作者:Hany F. Nour、Tamer El Malah、Emad K. Radwan、Randa E. Abdel Mageid、Tawfik A. Khattab、Mark A. Olson
DOI:10.1016/j.reactfunctpolym.2020.104795
日期:2021.1
bipyridinium-based dialdehyde (BIPY.2Br DA) in water under acidic conditions (pH, 2–3). The polymeric structure was constructed from alternating units of π-electron rich naphthyl and π-electron deficient bipyridinium (BIPY) moieties linked together via covalent acylhydrazone bonds. Ultraviolet-visible (UV–Vis) absorption analysis confirmed the occurrence of intramolecular donor-acceptor charge transfer (DA-CT) interactions
GRAM-POSITIVE CARBAPENEM ANTIBACTERIALS AND PROCESSES FOR THEIR PREPARATION
申请人:Choi Woo-Baeg
公开号:US20100075945A1
公开(公告)日:2010-03-25
The present invention provides β-methyl carbapenem compounds and pharmaceutical compositions useful in the treatment of bacterial infections and methods for treating such infections using such compounds and/or compositions. The invention includes administering an effective amount of a carbapenem compound or salt and/or prodrug thereof to a host in need of such a treatment. The present invention is also in the field of synthetic organic chemistry and is specifically provides an improved method of synthesis of β-methyl carbapenems which are useful as antibacterial agents.
Method of producing thermotropic liquid crystalline polyester
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP0520428A2
公开(公告)日:1992-12-30
A thermotropic liquid crystalline polyester is produced by carrying out polycondensation of ester monomer [I-2], an aromatic dicarboxylic acid [II] and an aromatic carboxylic acid [III-2]. The amounts of the compounds [I-2] and [II] are substantially equivalent and the amount of the compound [III-2] is not more than 20 times that of [I-2] by mole. A thermotropic liquid crystalline polyester having good heat resistance, fluidity and uniformity can be produced.