Uncatalyzed Michael addition of indoles: synthesis of some novel 3-alkylated indoles via a three-component reaction in solvent-free conditions
作者:Mohit L. Deb、Pulak J. Bhuyan
DOI:10.1016/j.tetlet.2007.01.105
日期:2007.3
Synthesis of some novel 3-alkylated indoles via an uncatalyzed Michael addition of indoles using three components in one-pot solvent-free conditions is reported. The mechanism was established by performing the reaction in two steps. The reaction was also studied in different solvents and an important solvent effect was noticed.
1,3-Diylideneisoindolines: Synthesis, Structure, Redox, and Optical Properties
作者:Yuriy V. Zatsikha、Briana R. Schrage、Julia Meyer、Victor N. Nemykin、Christopher J. Ziegler
DOI:10.1021/acs.joc.9b00468
日期:2019.5.17
Diiminoisoindoline (DII) is a crucial reagent for the synthesis of phthalocyanine as well as related macrocycles and chelates such as hemiporphyrazine and bis(iminopyridyl)isoindoline. In this report, we present the synthesis and characterization of four 1,3-diylideneisoindolines prepared via the reaction of several organic CH acids and DII. These orange or red compounds exhibit intense π → π* transitions
A method of producing a compound represented by formula (1), including: allowing 1,4-benzoquinone or 1,2-benzoquinone to react with a dithiocarbamate compound represented by formula (2) in a polar solvent:
wherein R
1
and R
2
each independently represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, R
1
and R
2
may be the same or different and may be combined with each other to form a ring, X represents an ion necessary to neutralize the charge of the molecule, m represents an integer of 1 to 2, n represents an integer of 1 to 2, M represents a hydrogen atom, a metal atom or a conjugate acid of a base, p represents an integer of 1 to 4, and q represents an integer of 1 to 4.
Under neutral conditions 5-arylidene 1, 3-dimethylbarbituric acid effectively oxidizes allylic and benzylic alcohols to the corresponding carbonyl compounds.There is a close relationship between oxidizing ability and electron density on the aromatic ring. The mechanism of this oxidation involves hydride transfer from the alcohol.
Synthesis of 3-trimethylsiloxy-1-(furan-3-yl)butadiene and its reactions with dienophiles
作者:Maxim E. Mironov、Irina Yu. Bagryanskaya、Elvira E. Shults
DOI:10.1007/s10593-016-1897-4
日期:2016.6
furan-3-yl)butadiene was synthesized and studied in reactions with 2,2-dimethyl-5-methylidene-1,3-dioxane-4,6-diones, 5-methylenepyrimidine-2,4,6-triones, as well as with imines. Reactions with dienophiles containing an exo-methylene double bond in the presence of L-proline occurred regio- and stereoselectively with the formation of 7-(furan-3-yl)spiro[5,5]undecane-1,5,9-triones or 7-(furan-3-yl)-2