Intramolecular N–Me and N–H aminoetherification for the synthesis of <i>N</i>-unprotected 3-amino-O-heterocycles
作者:Mahesh P. Paudyal、Mingliang Wang、Juha H. Siitonen、Yimin Hu、Muhammed Yousufuddin、Hong C. Shen、John R. Falck、László Kürti
DOI:10.1039/d0ob02122a
日期:——
A mild Rh-catalyzed method for synthesis of cyclic unprotected N–Me and N–H 2,3-aminoethers using an olefin aziridination–aziridine ring-opening domino reaction has been developed. The method is readily applicable to the stereocontrolled synthesis of a variety of 2,3-disubstituted aminoether O-heterocyclic scaffolds, including tetrahydrofurans, tetrahydropyrans and chromanes.
HFIP Solvent Enables Alcohols To Act as Alkylating Agents in Stereoselective Heterocyclization
作者:Yuxiang Zhu、Ignacio Colomer、Amber L. Thompson、Timothy J. Donohoe
DOI:10.1021/jacs.9b02198
日期:2019.4.24
method for the stereoselective synthesis of highly functionalized oxygen heterocycles using allyl or benzyl alcohols as alkylating agents is presented. The process is efficient and atom economic, generating water as the only stoichiometric byproduct. Substoichiometric amounts of Ti(OiPr)4 in HFIP solvent are key to this reactivity, and the method tolerates a broad substitution pattern on both the alcohol
mild method is reported for the construction of β-chlorotetrahydrofuran derivatives by 5-endo chlorocycloetherification of homoallylic alcohols. The system employs sulfurylchloride as the chlorinating agent under catalyst-free conditions. A variety of homoallylic alcohols with aryl or alkyl substituents were smoothly converted into β-chlorotetrahydrofurans in yields up to 98%. An efficient and mild method
[EN] Cu-MEDIATED ANNULATION FOR THE EFFECTIVE SYNTHESIS OF 3-SUBSTITUTED PHTHALIDES<br/>[FR] ANNÉLATION MÉDIÉE PAR LE CUIVRE POUR LA SYNTHÈSE EFFICACE DE PHTALIDES SUBSTITUÉS EN POSITION 3
申请人:COUNCIL SCIENT IND RES
公开号:WO2013102935A2
公开(公告)日:2013-07-11
The present invention disclosed herein is a novel commercially feasible, one pot synthesis of library of 3-substituted phthalides of formula I via CuCN mediated oxidative cyclization in high yield. Formula I
Alkene Dioxygenation with Malonoyl Peroxides: Synthesis of γ-Lactones, Isobenzofuranones, and Tetrahydrofurans
作者:Carla Alamillo-Ferrer、Marianna Karabourniotis-Sotti、Alan R. Kennedy、Matthew Campbell、Nicholas C. O. Tomkinson
DOI:10.1021/acs.orglett.6b01253
日期:2016.7.1
homoallylic alcohols or carboxylic acids with malonoyl peroxide 1 provides a stereoselective method for the preparation of tetrahydrofurans, γ-lactones, and isobenzofuranones in 44–82% yield and up to 27:1 trans selectivity. Application of this simple and effective heterocyclization in the synthesis of the antidepressant citalopram is also described.