Abstract Reactions of trifluoromethane- and tridecafluorohexanesulfonyl chlorides with silyl enol ethers have been investigated in the presence of a ruthenium(II) phosphine complex. Perfluoroalkylation and chlorination occurred depending on the substituent of silyl enol ether; i.e. perfluoroalkylated compound was selectively obtained in the reactions with silyl enol ether possessing an electron-withdrawing
摘要 在钌 (II) 膦配合物存在下,研究了三氟甲烷和十三氟己烷磺酰氯与甲硅烷基烯醇醚的反应。全氟烷基化和氯化反应的发生取决于甲硅烷基烯醇醚的取代基;即与具有吸电子基团的甲硅烷基烯醇醚反应选择性地得到全氟烷基化化合物,而与具有给电子基团的甲硅烷基烯醇醚反应选择性地生成氯化物。
REACTION OF TRIMETHYLSILYL ENOL ETHERS WITH ISOQUINOLINIUM SALTS. A FACILE SYNTHESIS OF ETHYL 1-(2-OXOALKYL)-1,2-DIHYDROISOQUINOLINE-2-CARBOXYLATES AND THEIR CYCLIZATION
作者:Makoto Wada、Masayuki Nakatani、Kin-ya Akiba
DOI:10.1246/cl.1983.39
日期:1983.1.5
An efficient method is described for the synthesis of ethyl 1-(2-oxoalkyl)-1,2-dihydroisoquinoline-2-carboxylates by C–C bond formation between 2-ethoxycarbonylisoquinolinium chloride and trimethylsilylenolethers. The products were treated with a few bases to afford the corresponding pyrido [2,1-a] isoquinoline derivatives.
synthesized by the fluoride ion-mediated reaction of [60]fullerene with 2-bromoenol silyl ethers, which were easily prepared by 2-bromination of the corresponding enol silyl ethers. The reactivity differed significantly depending on the stability of the 2-bromoenol silyl ethers. High yield and selectivity were achieved for the reaction of 2-bromoenol trimethylsilyl ethers under mild conditions (KF/18-crown-6-ether)
Oxymethylation of iron complexes [(cp)Fe(CO)<sub>2</sub>(R)] with HMMe<sub>3</sub>(M = Sn, Si; cp = C<sub>5</sub>H<sub>5</sub>) leading to R–CH<sub>2</sub>OH via a formylation–hydrometallation sequence
作者:Munetaka Akita、Tomoharu Oku、Yoshihiko Moro-Oka
DOI:10.1039/c39890001790
日期:——
Thermal reaction of (cp)Fe(CO)2(R), (cp)Fe(CO)2(COR), and (cp)Fe(CO)(PPh3)(COR)(cp = C5H5) with 3 equivalents of trimethyl-stannane or -silane, affords R–CH2OH (or R–CH2OSiMe3) and (cp)Fe(CO)H(MMe3)2 in good yields; the reaction sequence follows initial reduction of transient co-ordinativelyunsaturated acyl species to give the aldehyde and successive hydrometallation by the action of Me3M–Fe intermediates
(cp)Fe(CO)2(R),(cp)Fe(CO)2(COR)和(cp)Fe(CO)(PPh 3)(COR)的热反应(cp = C 5 H 5)用3当量的三甲基锡烷或-硅烷,可得到高收率的R–CH 2 OH(或R–CH 2 OSiMe 3)和(cp)Fe(CO)H(MMe 3)2;反应顺序是在瞬态配位不饱和酰基物种开始还原后,通过Me 3 M–Fe中间体的作用生成醛,然后进行加氢金属化反应。
Lithium Acetate-catalyzed Crossed Aldol Reaction between Aldehydes and Trimethylsilyl Enolates Generated from Other Aldehydes
Crossed aldolreactionbetween aromatic aldehydes having an electron-withdrawing group and trimethylsilylenolates generated from several aldehydes proceeded smoothly in dry or water-containing DMF...