Reactions of Ketone Hydrazones and β-Keto Enamines with Disulfur Dichloride. New Synthesis of Thioketones and 5<i>H</i>-1,2,3-Dithiazoles
作者:Renji Okazaki、Kaoru Inoue、Naoki Inamoto
DOI:10.1246/bcsj.54.3541
日期:1981.11
to afford thioketones in good yields. The reaction mechanism involving N-thiosulfinylamine (R2C=N–N=S=S) and S-thioxothioketone (R2C=S=S) is proposed. The formation of t-butyl and di-1-adamantyl thioketones even at low temperatures has been interpreted as steric congestion alone being not enough to stabilize the corresponding S-thioxothioketones. The reaction of β-ketoenamines with disulfur dichloride
Reaction of Seleno- or Thiofenchone with Propiolic Acid: Wagner-Meerwein Rearrangement
作者:Kentaro Okuma、Hiroyuki Matsui、Yuichi Mori
DOI:10.1002/hc.21181
日期:2014.11
A reaction of selenofenchone with propiolicacid in refluxing chloroform produced 1,3-oxaselenin-6-one, which further reacted with acid to afford the ring-opened product. A reaction of 1,3-oxathiin-6-one prepared from thiofenchone with trifluoroacetic acid gave a Wagner–Meerwein rearranged product. In the presence of AlCl3, thiofenchone reacted with methyl propiolate to afford the corresponding rearranged
reported. The reaction of dimagnesium salts of ketone hydrazones with diselenium dichloride affords an intermediate tentatively assigned as tetraselenides, which are converted into selenoketones by heating in the presence of tributylamine. A comparative study on the reactions of 1,1,3,3-tetramethyl-2-indanselone and the corresponding thioketone with Grignard and organolithium reagents have been carried
Nitric oxide donors, compositions and methods of use related applications
申请人:——
公开号:US20030203915A1
公开(公告)日:2003-10-30
The invention describes novel nitric oxide donors and novel compositions comprising at least one nitric oxide donor. The invention also provides novel compositions comprising at least one nitric oxide donor, and, optionally, at least one therapeutic agent. The compounds and compositions of the invention can also be bound to a matrix. The invention also provides methods for treating cardiovascular diseases, for the inhibition of platelet aggregation and platelet adhesion caused by the exposure of blood to a medical device, for treating pathological conditions resulting from abnormal cell proliferation; transplantation rejections, autoimmune, inflammatory, proliferative, hyperproliferative, vascular diseases; for reducing scar tissue or for inhibiting wound contraction, particularly the prophylactic and/or therapeutic treatment of restenosis by administering the nitric oxide donor optionally in combination with at least one therapeutic agent. The invention also provides methods for treating inflammation, pain, fever, gastrointestinal disorders, respiratory disorders and sexual dysfunctions. The nitric oxide donors donate, transfer or release nitric oxide, and/or elevate endogenous levels of endothelium-derived relaxing factor, and/or stimulate endogenous synthesis of nitric oxide and/or are substrates for nitric oxide synthase and are capable of releasing nitric oxide or indirectly delivering or transferring nitric oxide to targeted sites under physiological conditions. The therapeutic agent can optionally be substituted with at least one NO and/or NO
2
group (i.e., nitrosylated and/or nitrosated). The invention also provides novel compositions and kits comprising at least one nitric oxide donor and/or at least one therapeutic agent.