Practical one-pot preparation of ketones from aryl and alkyl bromides with aldehydes and DIH via Grignard reagents
作者:Souya Dohi、Katsuhiko Moriyama、Hideo Togo
DOI:10.1016/j.tet.2012.05.059
日期:2012.8
groups, such as ester, nitrile, ketone, and nitro groups with i-PrMgCl·LiCl or PhMgCl instead of Mg, also provided the corresponding diaryl and alkyl arylketones in good yields. The above methods are simple and practical transition-metal-free methods for the preparation of various diaryl ketones and alkyl arylketones bearing electron-rich aromatic groups and electron-deficient aromatic groups, as well
通过衍生自芳基或烷基溴化物的格利雅试剂的反应,然后与芳族或脂族醛的反应以及随后用1,3-二碘的处理,可以有效地以高收率高效地制备各种二芳基酮,烷基芳基酮和二烷基酮。一锅法中的-5,5-二甲基乙内酰脲和K 2 CO 3。相同的处理的芳族溴化物轴承吸电子基团,如酯,腈,酮和硝基与我-PrMgCl·LiCl或PhMgCl代替Mg,也以良好的收率提供了相应的二芳基和烷基芳基酮。以上方法是用于制备各种带有富电子芳族基团和缺电子芳族基团的二芳基酮和烷基芳基酮以及二烷基酮的简单且实用的无过渡金属的方法。
Stereodivergent synthesis of alkenes by controllable <i>syn</i>-/<i>anti</i>-fragmentation of β-hydroxysulfonyl intermediates
The reduction of the carbonyl group in acylated trifluoroethyl alkanesulfonates follows the Felkin-Ahn selectivity, and the so-formed diastereomeric β-hydroxysulfonyl intermediates undergo syn- and anti-fragmentation, depending on the reaction conditions. In effect, isomeric E- and Z-alkenes are formed in a stereodivergent manner, which mimics the mechanistic manifold of the Peterson olefination.
Cycloalkanones. 8. Hypocholesterolemic activity of long-chain ketones related to pentadecanone
作者:Steven D. Wyrick、Iris H. Hall、Claude Piantadosi、Charles R. Fenske
DOI:10.1021/jm00224a005
日期:1976.2
Aliphatic analogs of 2,8-dibenzylcyclooctanone which includes C15-C18 ketones have been investigated for hypocholesterolemicactivity in rats. The position of the carbonyl group in the chain for maximum activity appears to be the 2 position. 2-Hexadecanone reduced serum cholesterol levels significantly without altering serum triglyceride levels. This drug was not estrogenic at effective doses which
α-Hydroxy ketones (acyloins) and their acetate or mesylate derivatives were reduced to the corresponding ketones in good yields by treatment with [V2Cl3(THF)6]2[Zn2Cl6] complex prepared in situ from VCl3(THF)3 and zinc.
COALESCING AGENT DERIVED FROM DIOXOLANE DERIVATIVES
申请人:PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED
公开号:US20190194157A1
公开(公告)日:2019-06-27
The present invention relates to a coalescing agent as represented in structure (I); wherein; n is integer from 1 to 8; R
1
and R
2
independently represent group selected from hydrogen atom, alkyl, alkenyl, alkynyl, phenyl, benzyl groups, or optionally cyclic hydrocarbon containing heteroatom; and Y represents group selected from alkyl, alkenyl, alkynyl, phenyl, benzyl groups, or cyclic hydrocarbon containing heteroatom. The said coalescing agent can be used in coating application with efficacy to provide smooth consistent film with chemical and scratch resistant and has no pungent odour, wherein the preparation method of this compound is simplify and employs less harmful chemicals.