Specific <i>Z</i>-Selectivity in the Oxidative Isomerization of Allyl Ethers to Generate Geometrically Defined <i>Z</i>-Enol Ethers Using a Cobalt(II)(salen) Complex Catalyst
作者:Guanxin Huang、Miaolin Ke、Yuan Tao、Fener Chen
DOI:10.1021/acs.joc.0c00004
日期:2020.4.17
synthesis of the geometrically less stable Z-enol ethers is challenging. An efficient Z-selective oxidative isomerization process of allyl ethers catalyzed by a cobalt(II) (salen) complex using N-fluoro-2,4,6-trimethylpyridinium trifluoromethanesulfonate (Me3NFPY•OTf) as an oxidant has been developed. Thermodynamically less stable Z-enol ethers were prepared in excellent yields with high geometric control.
A facile and efficient route to synthesize macrocyclictetralactones with different ring sizes having a wide variety of spacers is described. The application of ring-closing metathesis for the synthesis of macrocyclictetralactones is demonstrated with many examples in excellent yield. The representative structure of macrocyclictetralactones is characterized by X-ray crystallography.
an attempt to molecularly design liverXreceptor (LXR) β-selective agonists, we discovered that the combination of the 2-oxochromene moiety (head) and the imidazoline-2,4-dione moiety (tail) plays an important role in the expression potency and selectivity toward LXRβ. We synthesized a series of 2-oxochromene derivatives and identified 43 as a LXRβ-selective agonist that increased the HDL-C level without
在分子设计肝X受体(LXR)β-选择性激动剂的尝试中,我们发现2-氧代色烯部分(头部)和咪唑啉-2,4-二酮部分(尾巴)的组合在表达能力和对LXRβ的选择性。我们合成了一系列2-oxochromene衍生物,并确定了43种LXRβ选择性激动剂,可在不显着升高TG水平的情况下增加HDL-C水平,并导致高脂饮食中主动脉弓内脂质蓄积面积减少。和胆固醇喂养的Bio F 1 B仓鼠。在这份手稿中,我们报告了这些2-氧代苯并二氢吡喃衍生物的设计,合成和药理作用。
Efficient Synthesis of Oxygenated Terphenyls and Other Oligomers: Sequential Arylation Reactions Through Phenol Oxidation-Rearomatization
作者:Toshifumi Dohi、Tohru Kamitanaka、Shohei Watanabe、Yinjun Hu、Naohiko Washimi、Yasuyuki Kita
DOI:10.1002/chem.201202086
日期:2012.10.22
One by one: Starting from simple phenols, a diverse series of oxygenatedterphenyl compounds can be prepared in a concise and practical manner using sequentialarylationreactions involving phenol oxidation/rearomatization and quinone monoacetal intermediates (see scheme). Many of the terphenyl products can be used for preparing well‐defined oligomers and, furthermore, contain valuable functional groups
METHODS AND COMPOSITIONS FOR CONTROL OF GYPSY MOTHS, Lymanria dispar
申请人:Plettner Erika
公开号:US20100190865A1
公开(公告)日:2010-07-29
The invention provides in part dialkoxybenzene and eugenol compounds for controlling infestation by a
Lymantria dispar
, and methods thereof. The compounds include a compound of Formula I:
where R1 may be methyl, ethyl, propyl, n-butyl, isopentyl (3-methylbutyl) or allyl; R2 may be at positions 2, 3 or 4 and may be H, methyl, ethyl, propyl, n-butyl, isopentyl (3-methylbutyl) or allyl; and R3 may be optionally present at positions 2, 3 and 4, and is allyl; with the provisos that when R2 is at position 2, R3 if present is at position 3, or when R2 is at to position 3, R3 if present is at positions 2 or 4, or when R2 is at position 4, R3 if present is at position 2;
or of Formula II:
where R1 may be methyl, ethyl, propyl, n-butyl, isopentyl (3-methylbutyl) or allyl; or mixtures thereof.