Indium Triiodide Catalyzed Direct Hydroallylation of Esters
作者:Yoshihiro Nishimoto、Yoshihiro Inamoto、Takahiro Saito、Makoto Yasuda、Akio Baba
DOI:10.1002/ejoc.201000475
日期:——
InI 3 -catalyzed hydroallylation of esters by using hydro-and allysilanes under mild conditions has been accomplished. Many significant groups such as alkenyl, alkynyl, cyano, and nitro ones survive under these conditions. This reaction system provided routes to both homoallylic alcohols and ethers, in which either elimination of the alkoxy moiety or of the carbonyl oxygen atom could be freely selected
通过在温和条件下使用氢化硅烷和烯丙基硅烷完成了 InI 3 催化的酯的氢化烯丙基化。许多重要的基团,如链烯基、炔基、氰基和硝基基团在这些条件下仍然存在。该反应体系为高烯丙醇和醚提供了途径,其中烷氧基部分或羰基氧原子的消除可以通过改变烷氧基部分和氢硅烷上的取代基自由选择。此外,内酯的氢烯丙基化发生在不开环的情况下,以高产率生产所需的环醚。
Indium(I)/CuFe2O4
Reagent for Allylation of Carbonyls and Epoxide Rearranged Carbonyls
作者:M. Kundu、S. P. Mandal、B. Mondal、U. K. Roy
DOI:10.1134/s1070363220110274
日期:2020.11
Indium(I)/CuFe2O4 reagent for carbonyl allylation and epoxide rearranged carbonyl allylation is proposed for formation of homoallylic alcohols. The In(I) reagent in combination with catalytic amount of CuFe2O4 support in situ formation of nucleophilic allylic indium from allyl halide in THF medium. Nucleophilic allylic indium species react with carbonyls to form homoallyl alcohols in good to excellent
Tuning the reactivity of organotin(IV) by LiOH: allylation and propargylation of epoxides via redox transmetalation
作者:Moloy Banerjee、Ujjal Kanti Roy、Pradipta Sinha、Sujit Roy
DOI:10.1016/j.jorganchem.2004.12.008
日期:2005.3
In presence of catalytic Pd(0) or Pt(II), a reagent combination of SnCl2-LiOH promotes the reaction of organic halides and epoxides in dichloromethane leading to the regioselective formation of corresponding homoallyl and homopropargyl alcohols in good yields. This 2-carbon extension strategy adds to the repertoire of Barbier reactions via metal salts and reinforces views on the enhanced reactivity of organotin having -OH pendant. (c) 2004 Elsevier B.V. All rights reserved.
A Highly Atom Efficient, Solvent Promoted Addition of Tetraallylic, Tetraallenic, and Tetrapropargylic Stannanes to Carbonyl Compounds
作者:Adam McCluskey、I. Wayan Muderawan、Muntari、David J. Young
DOI:10.1021/jo015904x
日期:2001.11.1
Tetraallylic, tetraallenic, and tetrapropargylic stannanes (0.25 equiv) react with aldehydes in methanol to provide unsaturated alcohols in good to excellent yields (56-99%). These reactions proceed exclusively with allylic rearrangement for tetra(2-butenyl)tin 2b and tetra(1,2-butadienyl)tin 16c and predominantly with allylic rearrangement for tetrapropadienyltin 16a and tetra(2-butynyl)tin 6e. Allylation. reactions also proceeded smoothly with reactive ketones such as ethyl pyruvate (9a) and cyclohexanone (9b). The corresponding TFA-catalyzed reactions of dimethyl acetals 4d and 4e are regiospecific with allylic rearrangement.
Highly efficient water promoted allylation and propargylation of arylepoxides via rearrangement-carbonyl addition
作者:Ujjal Kanti Roy、Sujit Roy
DOI:10.1016/j.tet.2005.10.005
日期:2006.1
A simple and highly efficient one-pot procedure for allylation and propargylation of arylepoxides has been developed. A combination of SnCl2 and catalytic Pd(0) or Pd(II) promotes the reaction of organic halides and epoxides in DMSO with controlled water addition, leading to the regioselective formation of the corresponding homoallyl and homopropargyl alcohols in good yields. (c) 2005 Elsevier Ltd. All rights reserved.