Direct Chemoselective Allylation of Inert Amide Carbonyls
作者:Yukiko Oda、Takaaki Sato、Noritaka Chida
DOI:10.1021/ol3000316
日期:2012.2.3
Direct allylation of inert amidecarbonyls utilizing the Schwartz reagent afforded either substitutedtertiary or secondary amines. A preactivation step was successfully avoided, which is generally a requisite to increase the electrophilicity of amides. The reaction exhibited remarkable functional group tolerance and proceeded even in the presence of methyl esters and nitro groups.
Barbier-type allylation of unactivated aldimines with allyl bromides in the presence of indium powder took place rapidly in alcoholic solvents to give homoallylic amines in fair to good yields.
A three-component synthesis of homoallylic amines catalyzed by CuI
作者:Pabitra Kumar Kalita、Prodeep Phukan
DOI:10.1016/j.tetlet.2008.07.032
日期:2008.9
Cuprous iodide is a very effective catalyst for the three-component condensation of an aldehyde, benzylamine and allyltributylstannane in DMF to produce homoallylicamines in high yields.
A general, mild, and chemoselective one-pot oxidation/imine-iminium formation/nucleophilic addition sequence allowing the N-alkylation of amines by alcohols is described. This metal-free, one-potsequence produced a wide variety of amines in good yields and diastereoselectivities, without the epimerization of the enantioenriched amines or alcohols involved in the process. This method was applied to
Efficient Synthesis of Homoallylic Alcohols/Amines from Allyltributylstannane and Carbonyl Compounds/Imines Using Iodine as Catalyst Under Acetic Acid–Water Medium
This paper describes a general method for the synthesis of homoallylic alcohols and amines by nucleophilic addition reaction of allyltributylstannane to carbonyl compounds and aldimines where iodine acts as a catalyst in H2O/acetic acid (1:1) medium. Only 10mol% of I-2 is required for various organic transformations. By using this process, various homoallylic alcohols and amines are produced in good to excellent yields.