In a process to make dithiodiglycol by oxidation of &bgr;-mercaptoethanol with sulfur, an improved product is recovered when a 1-10 mol % excess of &bgr;-mercaptoethanol is used and hydrogen sulfide is removed by vacuum or nitrogen sparge. A typical product contains 88.1 mol % (92.0 wt %) dithiodiglycol, 2.3 mol % (2.9 wt %) trithiodiglycol and 9.6 mol % (5.1 wt %) unreacted &bgr;-mercaptoethanol. Reaction of this product with 35 to 50 wt % solution hydrogen peroxide reduces residual &bgr;-mercaptoethanol to less than 0.02 wt % mercaptan. Residual water of about 3.6 wt % after hydrogen peroxide treatment is reduced to less than 1 wt % by vacuum stripping and/or nitrogen sparge or with a wiped film evaporator.
TBAF Promoted Formation of Symmetrical Trisulfides
作者:Slawomir Lach、Dariusz Witt
DOI:10.1002/hc.21129
日期:2014.1
developed a new method for the synthesis of functionalized symmetricaltrisulfides based on (5,5-dimethyl-2-thioxo-1,3,2-dioxa-phosphorin-2-yl)disulfanyl derivatives prepared from readily available 5,5-dimethyl-2-sul-fanyl-2-thioxo-1,3,2-dioxaphosphorinane or bis(5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinan-2-yl) disulfide. The symmetricaltrisulfides can be obtained from aliphatic and aromatic thiols and
straightforward preparation of (5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorin-2-yl)disulfanyl derivatives from readily available 5,5-dimethyl-2-sulfanyl-2-thioxo-1,3,2-dioxaphosphorinane or bis(5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinan-2-yl) disulfide. The symmetrical trisulfides can be obtained from aliphatic and aromaticthiols and also l-cysteine derivatives. symmetrical trisulfides -thiols- sulfenyl
The biothiol-triggered organotrisulfide-based self-immolative fluorogenic donors of hydrogen sulfide enable lysosomal trafficking
作者:Sulendar K. Mahato、Debojit Bhattacherjee、Krishna P. Bhabak
DOI:10.1039/d0cc00613k
日期:——
The biothiol-reactive organotrisulfide-based fluorogenic donors of H2S are designed for the monitoring of intracellular and lysosomal delivery of H2S with a concomitant turn-on fluorescence.
作者:Francesca Ercole、Yuhuan Li、Michael R. Whittaker、Thomas P. Davis、John F. Quinn
DOI:10.1039/c9tb02614b
日期:——
by the properties of the naturally occurring H2S donor, diallyl trisulfide (DATS, extracted from garlic), the biological behaviour of trisulfide-bearing PEG-conjugates was explored. Specifically, three conjugates comprising an mPEG tail and a cholesteryl head were investigated: conjugates bridged by a trisulfide linker (T), a disulfide linker (D) or a carbamate linker (C), and a fourth comprising two