A Convenient Synthesis of Arylselenoacetals and α-Halo-α-(phenylseleno)alkanes
摘要:
alpha-Halo-alpha-(phenylseleno)alkanes are prepared by treatment of selenoacetals with halogenating agents. Selenoacetals are produced by heating alpha-halo-alpha-(phenylseleno)alkanes on neutral alumina
已开发出一种有效的,选择性的方法,可以从容易获得的二硒化物和苯乙酸合成含一个或两个双键C-Se键的硒醚。通过在无金属条件下将空气用作氧化剂来制备包含一个C-Se键的化合物,而通过氯化铁(III)/氧/碳酸铯(FeCl 3 / O 2)形成具有两个双键C-Se键的化合物。/ Cs 2 CO 3)系统。此外,在标准反应条件下,1,2-二苯基二硫烷也可以平稳地转化为相应的硫醚产物。
Trithioorthoester Exchange and Metathesis: New Tools for Dynamic Covalent Chemistry
作者:Michael Bothe、A. Gastón Orrillo、Ricardo L. E. Furlan、Max von Delius
DOI:10.1055/s-0039-1690992
日期:2019.10
acid-catalyzed exchangereaction of trithioorthoesters with thiols. We found that trithioorthoester exchange occurs readily in various solvents in the presence of stoichiometric amounts of strong Bronsted acids or catalytic amounts of certain Lewis acids. The scope of the exchangereaction was explored with various substrates, and conditions were identified that permit clean metathesis reactions between two
New synthetic routes to vinyl sulfides, ketene thioacetals and their seleno analogues from carbonyl compounds
作者:J.N. Denis、S. Desauvage、L. Hevesi、A. Krief
DOI:10.1016/s0040-4039(01)82051-7
日期:1981.1
Title compounds have been prepared from carbonyl compounds by formal removal of hydroxyl and sulfenyl or hydroxyl and selenyl moieties from the corresponding functionalized β-hydroxysulfides or β-hydroxyselenides.
The 1-(organoselanyl)perfluoroalkanols 1, 3, 4, and 10 were successfully prepared and reactions with hexanoyl chlorides to produce the corresponding esters 5, 7, and 8, accompanied by the selenoesters 6 were conducted. The DBU-mediated alkylations of the heptafluorobutanols 4, 10, and the α-p-nitrobenzoate 2 with alkyl halides easily provided alkyl phenyl selenides 9a–9i and 11a–11c in good to high yields.
Lewis acid-catalyzed coupling reactions of allylsilanes with tris(phenylchalcogeno)methane. Synthesis of homoallylchalcogenoacetals
作者:Claudio C Silveira、Gustavo L Fiorin、Antonio L Braga
DOI:10.1016/0040-4039(96)01298-1
日期:1996.8
Reaction of allylsilanes with tris(phenylseleno)methane or tris(phenylthio)methane in the presence of a Lewis acid furnishes the corresponding homoallylchalcogenoacetals in moderate to good yields.
Multinuclear NMR Study of the Solution Structure and Reactivity of Tris(trimethylsilyl)methyllithium and its Iodine Ate Complex
作者:Hans J. Reich、William H. Sikorski、Aaron W. Sanders、Amanda C. Jones、Kristin N. Plessel
DOI:10.1021/jo802032d
日期:2009.1.16
The extreme steric bulk of tris(trimethylsilyl)methyl derivatives (1-X) provides interesting structural and dynamic behavior for study. Dynamic NMR studies on 1-SePh and 1-I showed restricted rotation around the C−Si bonds of each trimethylsilyl groups. An extensive multinuclear NMR study of natural abundance and 6Li and 13C enriched 1-Li revealed three species in THF-containing solvents, a dimer 1T