The cyclization reaction of diallyldibutyltin and α- or γ-halo ketones, especially chloro-substituted ketones, effectively proceeds in the presence of a catalytic amount of tetraethylammonium chloride, producing the corresponding 2-allyloxiranes or 2-allyltetrahydrofurans in high yield, respectively. β-Chloro ketones give the corresponding allyl alcohols.
Tandem hydroalkoxylation/hydroallylation and hydroalkoxylation/hydrocyanation reactions of alkyl-substituted unactivated alkynes by catalytic systems based on B(C6F5)3·nH2O and silyl nucleophiles were developed. The characteristic high alkynophilicity of B(C6F5)3 enabled the selective activation of the unactivated alkynes in the presence of the reactive alkene of allylsilane. Moreover, the alkynes
基于B(C 6 F 5)3 · n H 2 O和甲硅烷基亲核试剂的催化体系,开发了烷基取代的未活化炔烃的串联加氢烷氧基化/加氢芳基化和加氢烷氧基化/加氢氰化反应。B(C 6 F 5)3的特征性高亲核性使它能够在烯丙基硅烷的反应性烯烃存在下选择性活化未活化的炔烃。此外,在该催化体系中,在氰化物存在下,炔烃被亲电活化。机理研究表明,炔烃在两个反应中被不同的催化物种活化。
Synthesis of substituted cyclic ethers from halo ketones and halo aldehydes by palladium-catalyzed coupling with organotin reagents
作者:I. Pri-Bar、P. S. Pearlman、J. K. Stille
DOI:10.1021/jo00172a037
日期:1983.12
Barluenga, Jose; Rubiera, Covadonga; Fernandez, Jose R., Journal of Chemical Research, Miniprint, 1987, # 12, p. 3242 - 3264
作者:Barluenga, Jose、Rubiera, Covadonga、Fernandez, Jose R.、Florez, Josefa、Yus, Miguel
DOI:——
日期:——
BORLUENGA, JOSE;RUBIERA, COVADONGA;FERNANDEZ, JOSE R.;FLOREZ, JOSEFA;YUS,+, J. CHEM. RES. (S),(1987) N2, C. 400-401
作者:BORLUENGA, JOSE、RUBIERA, COVADONGA、FERNANDEZ, JOSE R.、FLOREZ, JOSEFA、YUS,+