52053-61-9Relevant articles and documents
Direct Nucleophilic Substitution of Alcohols Using an Immobilized Oxovanadium Catalyst
Nishio, Tomoya,Yoshioka, Shin,Hasegawa, Kai,Yahata, Kenzo,Kanomata, Kyohei,Akai, Shuji
, p. 4417 - 4422 (2021/07/16)
Direct nucleophilic substitution of alcohols with thiols or carbon nucleophiles was achieved using a mesoporous silica-supported oxovanadium catalyst (VMPS4). Benzyl and allyl alcohols were compatible in this reaction under mild conditions, affording the products in high yields. The VMPS4 catalyst showed excellent chemoselectivity toward alcohols in the presence of acid-labile functional groups, which is in contrast to that observed for the commonly used Lewis acid catalysts, which exhibit poor selectivity. The VMPS4 catalyst could be recycled by simple centrifugation, and the catalytic activity was maintained over seven cycles.
A waiting carbon nitride radical anion: A charge storage material and key intermediate in direct C-H thiolation of methylarenes using elemental sulfur as the s -source
Savateev, Aleksandr,Kurpil, Bogdan,Mishchenko, Artem,Zhang, Guigang,Antonietti, Markus
, p. 3584 - 3591 (2018/04/12)
Potassium poly(heptazine imide), a carbon nitride based semiconductor with high structural order and a valence band potential of +2.2 V vs. NHE, in the presence of hole scavengers and under visible light irradiation gives the corresponding polymeric radical anion, in which the specific density of unpaired electrons reaches 112 μmol g-1. The obtained polymeric radical anion is stable under anaerobic conditions for several hours. It was characterized using UV-vis absorption, time resolved and steady state photoluminescence spectra. The electronic structure of the polymeric radical anion was confirmed by DFT cluster modelling. The unique properties of potassium poly(heptazine imide) for storing charges were employed in visible light photocatalysis. A series of substituted dibenzyldisulfanes was synthesized in 41-67% yield from the corresponding methylarenes via cleavage of the methyl C-H bond under visible light irradiation and metal-free conditions.
Imidazole Promoted Highly Efficient Large-Scale Thiol-Free Synthesis of Symmetrical Disulfides in Aqueous Media
Mokhtari, Babak,Kiasat, Ali Reza,Monjezi, Javid
, p. 1573 - 1579 (2015/09/15)
A highly efficient and environmentally friendly method for the imidazole promoted preparation of symmetrical organic disulfides from Bunte salts is described. This thiol-free procedure produces the desired disulfides even on a large scale by reaction of Bunte salts with imidazole in good to high yields in aqueous media.