Aliphatic Friedel-Crafts reactions. Part VIII. Preparation of unsaturated ketones by the acylation of 1-alkylcyclopentenes
作者:J. K. Groves、N. Jones
DOI:10.1039/j39690000608
日期:——
Reaction of 1-ethylcyclopentene with zinc chloride–acetic anhydride affords 5-acetyl-1-ethylcyclopentene (39%) and 1-acetyl-2-ethylidenecyclopentane (13%). Similar products are obtained in the acetylation of other n-alkylcyclopentenes, with the exception of 1-methylcyclopentene which yields a mixture of 5-acetyl-1-methylcyclopentene and 1-acetyl-2-methylcyclopentene in a ratio of ca. 3 : 2. Treatment
Convenient ‘one-flask’ synthesis of olefins. Reaction of α-chloroketones with Grignard reagents and lithium
作者:José Barluenga、Miguel Yus、Pablo Bernad
DOI:10.1039/c3978000847a
日期:——
Olefins and diolefins with the double bonds in predetermined positions are prepared in a one-step process in moderate to good yields by the reaction of α-chloroketones with Grignardreagents and then with lithium.
B(C
<sub>6</sub>
F
<sub>5</sub>
)
<sub>3</sub>
‐Catalyzed
<i>E</i>
‐Selective Isomerization of Alkenes
作者:Betty A. Kustiana、Salma A. Elsherbeni、Thomas G. Linford‐Wood、Rebecca L. Melen、Matthew N. Grayson、Louis C. Morrill
DOI:10.1002/chem.202202454
日期:2022.11.11
report the B(C6F5)3-catalyzed E-selective isomerization of alkenes. The transition-metal-free method is applicable across a diverse array of readily accessible substrates, accessing a broad range of synthetically useful products containing versatile stereodefined internal alkenes. Synthetic and computational mechanistic studies indicate that the isomerization proceeds along competing 1,2-hydride shift
Move along !:在此,我们报道了 B(C 6 F 5 ) 3 -催化的E -烯烃选择性异构化。不含过渡金属的方法适用于各种易于获得的底物,可获得范围广泛的合成有用产品,其中包含多功能立体定义的内部烯烃。合成和计算机理研究表明,异构化沿着竞争性 1,2-氢化物转移和氢化物提取途径进行。
Barluenga, Jose; Yus, Miguel; Concellon, Jose M., Journal of Chemical Research, Miniprint, 1980, # 2, p. 677 - 692
作者:Barluenga, Jose、Yus, Miguel、Concellon, Jose M.、Bernad, Pablo
DOI:——
日期:——
Mousseron et al., Bulletin de la Societe Chimique de France, 1946, p. 629,632