A new type of allylation: synthesis of β,γ-unsaturated ketones from α-halogenated aryl ketones using an allyltributyltin(IV)–tin(II) dichloride–acetonitrile system
作者:Makoto Yasuda、Makihiro Tsuchida、Akio Baba
DOI:10.1039/a708679b
日期:——
Allylation of α-halogenated aryl ketones with an allyltributyltinâtin dichlorideâacetonitrile system gave β,γ-unsaturated ketones in high yields via selective aryl rearrangement.
Synthesis of <i>Z</i>-Alkenes from Rh(I)-Catalyzed Olefin Isomerization of β,γ-Unsaturated Ketones
作者:Lian-Gang Zhuo、Zhong-Ke Yao、Zhi-Xiang Yu
DOI:10.1021/ol401607c
日期:2013.9.20
Developing olefin isomerization reactions to reach kinetically controlled Z-alkenes is challenging because formation of trans-alkenes is thermodynamically favored under the traditional catalytic conditions using acids, bases, or transition metals as the catalysts. A new synthesis of Z-alkenes from Rh(I)-catalyzed olefin isomerization of β,γ-unsaturated ketones to α,β-unsaturated ketones was developed
A visible-light-induced dioxygenation of β,γ-unsaturatedoximes for the synthesis of diverse useful isoxazolines bearing a hydroxyl moiety was developed by employing graphitic carbon nitride (g-C3N4) as a heterogeneous photocatalyst under an air atmosphere. Noted that, the eminent advantages of this metal-free protocol include step economy, easy operation, a recyclable photocatalyst, external reductant-/oxidant-free
通过在空气气氛下使用石墨氮化碳 (gC 3 N 4 ) 作为非均相光催化剂,开发了一种可见光诱导的β , γ -不饱和肟的双氧合,用于合成各种有用的带有羟基的异恶唑啉。值得注意的是,这种无金属协议的显着优势包括步骤经济、易于操作、可回收的光催化剂、外部还原剂/氧化剂和温和的反应条件。此外,机理研究表明,在 gC 3 N 4的光催化作用下会产生羟基自由基。
Boron Trifluoride Mediated Allylation of Aromatic α-Bromoketones by Allyltributyltin
Replacement of bromine atom of aromatic α-brormoketones by allyltributyltin in the presence of BF3 was described. The reaction proceeds with or without migration of the aryl group, depending on the structure of the α-bromoketone.
Regioselective Allylation of Ketenes Promoted by SmI<sub>2</sub>
作者:Norikazu Miyoshi、Seiji Takeuchi、Yoshiaki Ohgo
DOI:10.1246/bcsj.67.445
日期:1994.2
Ketenes react with various allylic halides mediated by 2 equiv samarium(II) diiodide (SmI2) to the ketenes to afford allylated ketones in good yields. In the reaction with γ-substituted allylic halides, the regioselectivity is influenced by the olefinic geometry of allylic halides. By using γ-substituted (E)-allylic halides, the allylation proceeds on the less hindered site (α-position) of allylic groups predominantly and the tendency was enhanced by the addition of HMPA.