functionalizations of more distal C-H bonds in hydrocinnamoyl ketones, Weinreb amides, and biphenyl Weinreb amides. Mechanistically, the coordination of these carbonyl groups and the bisdentate amino acid ligand with Pd(II) centers provides further evidence for our early hypothesis that the carbonyl groups of the potassium carboxylate are responsible for the directed C-H activation of carboxylicacids.
Iodide ion promotion of benzyl chloride-borate ester carbonylation reactions
作者:Howard Alper、Nathalie Hamel、James B. Woell、David J.H. Smith
DOI:10.1016/s0040-4039(00)95072-x
日期:1985.1
Esters are isolated in fine yields from the rhodium(I) catalyzed reaction of benzyl chlorides with borate esters and carbon monoxide, in the presence of potassium iodide.
Synthesis of esters by rhodium(i) catalyzed borate ester-benzylic bromide carbonylation reactions
作者:James B. Woell、Howard Alper
DOI:10.1016/s0040-4039(01)91168-2
日期:1984.1
Benzyl halides react with trialkylborates and carbon monoxide, in the presence of 1,5-hexadienerhodium chloride dimer, to give esters In excellent yields. The reaction is applicable to the synthesis of primary, secondary and even tertiary esters.
Process for the production of carboxylic acid esters
申请人:The British Petroleum Company p.l.c.
公开号:EP0132144A1
公开(公告)日:1985-01-23
Carboxylic acid esters are produced by reacting (i) carbon monoxide, (ii) a compound of the formula M(OR)x wherein M is either boron, silicon, aluminium, titanium or zirconium, x is the valency of M and R is a hydrocarbyl group and (iii) a hydrocarbyl halide, wherein the halide moiety is bromide, chloride or iodide, in the presence of a catalyst comprising one or more of the metals rhodium, iridium and cobalt in either elemental or compound form. When M is boron, silicon or aluminium and the halide moiety is chloride, there is preferably added a source of iodide.
羧酸酯是通过以下反应制得的:(i) 一氧化碳;(ii) 式 M(OR)x 的化合物,其中 M 为硼、硅、铝、钛或锆,x 为 M 的化合价,R 为烃基;(iii) 烃基卤化物,其中卤化物为溴化物、氯化物或碘化物。当 M 为硼、硅或铝且卤化物分子为氯时,最好添加碘源。
ALPER, H.;HAMEL, N.;SMITH, D. J. H.;WOELL, J. B., TETRAHEDRON LETT., 1985, 26, N 19, 2273-2274
作者:ALPER, H.、HAMEL, N.、SMITH, D. J. H.、WOELL, J. B.