Phthalimidesulfenyl Chloride; Part VII:<sup>1</sup>Synthesis of 2-Substituted 3-Chlorobenzo[<i>b</i>]thiophenes and Related Heteroaromatics
作者:Giuseppe Capozzi、Francesco De Sio、Stefano Menichetti、Cristina Nativi、Pier Luca Pacini
DOI:10.1055/s-1994-25516
日期:——
Addition of phthalimidesulfenyl chloride (1) to diaryl- or alkyl(aryl) acetylenes affords (E)-ß-chlorovinylsulfenamides 3. These species react with aluminum trichloride and other Lewis acids to give benzo-[b]thiophenes 6 through an intramolecular electrophilic substitution. The reaction is very simple and seems insensitive to the nature of substituents at the double bond of vinylsulfenamides 3. Following the same strategy the thienothiophene 11 and the condensed thiopyran 12 were also prepared.
[EN] PYRIDINIUM, QUINOLINIUM, ACRIDINIUM, PYRYLIUM, CHROMENYLIUM OR XANTHYLIZUM REACTIVE DESORPTION AND/OR LASER ABLATION IONIZATION MATRICES AND USE THEREOF<br/>[FR] MATRICES D'IONISATION RÉACTIVES AVEC DÉSORPTION ET/OU ABLATION LASER ET LEUR UTILISATION
申请人:ANDREN PER
公开号:WO2019172830A1
公开(公告)日:2019-09-12
The present disclosure concerns use of compounds of formula I, or salts thereof, as reactive matrices for desorption and laser ablation ionization spectrometry. The disclosure further concerns compounds of formula II, or salts thereof, and use of compounds of formula II or III, or salts thereof.
Alkyne metathesis with simple catalyst systems: High yield dimerization of propynylated aromatics; scope and limitations
作者:Neil Gregory Pschirer、Uwe H.F. Bunz
DOI:10.1016/s0040-4039(99)00282-8
日期:1999.3
yield dimerization of propynylated benzenes and propynylnaphthalene by a mixture of Mo(CO)6 and 4-chlorophenol at 140 °C in 1,2-dichlorobenzene is reported to give the corresponding disubstituted alkynes. The scope and limitation of the reaction and the influence of substitution pattern and substitution type are discussed. Oxygen or nitrogen carrying substrates metathesize in moderate to good yields