Thiol compound, method for producing the same and optical product made with the same
申请人:Hoya Corporation
公开号:US20030114630A1
公开(公告)日:2003-06-19
A thiol compound useful as a starting material for optical materials that have a high refractive index and a high Abbe's number is provided. A method for producing the same is also provided. The thiol compound may be represented by the general formula (1):
1
wherein n is 1 or 2. A method for producing the thiol compound represented by the general formula (1), via an intermediate, i.e., 1,3,5-trithiane having a methylene or vinyl group at the 2,4,6-positions thereof, wherein the groups at the 2-, 4-, and 6-positions may be identical or different, is also provided.
Structure-reactivity relations for thiol-disulfide interchange
作者:Janette Houk、George M. Whitesides
DOI:10.1021/ja00256a040
日期:1987.10
di- and trithiols and the disulfides derived from either 2-mercaptoethanol or dithiothreitol. Reactions were conducted in methanol-d,/aqueous buffer (pH 7) or methanold, at 25 "C, using NMR spectroscopy to follow the reactions. These data were used to rank the dithiols in terms of reduction potential and to infer the structure of the disulfides formed from them on oxidation. There is a general correlation
Novel Synthetic Inhibitors of Selectin-Mediated Cell Adhesion: Synthesis of 1,6-Bis[3-(3-carboxymethylphenyl)-4-(2-α-<scp>d</scp>-mannopyranosyloxy)phenyl]hexane (TBC1269)
作者:Timothy P. Kogan、Brian Dupré,、Huong Bui、Kathy L. McAbee、Jamal M. Kassir、Ian L. Scott、Xin Hu、Peter Vanderslice、Pamela J. Beck、Richard A. F. Dixon
DOI:10.1021/jm9704917
日期:1998.3.1
Reports of a high-affinity ligand for E-selectin, sialyl di-Lewis(x) (sLe(x)Le(x), 1), motivated us to incorporate modifications to previously reported biphenyl-based inhibitors that would provide additional interactions with the protein. These compounds were assayed for the ability to inhibit the binding of sialyl Lewis(x) (sLe(x), 2) bearing HL-60 cells to E-, P-, and L-selectin fusion proteins.
A Dual Wavelength Polymerization and Bioconjugation Strategy for High Throughput Synthesis of Multivalent Ligands
作者:Zihao Li、Shashank Kosuri、Henry Foster、Jarrod Cohen、Coline Jumeaux、Molly M. Stevens、Robert Chapman、Adam J. Gormley
DOI:10.1021/jacs.9b09899
日期:2019.12.18
side chain of linear polymers or the α-chain end of star polymers. Polymerizations are performed under visible light using an oxygen tolerant porphyrin-catalyzed photoinduced electron/energy transfer-reversible addition-fragmentation chain-transfer (PET-RAFT) process, after which the deprotection and click reaction is triggered by UV light. Using this approach, we are able to precisely control the valency
Benzylic oligothioethers as ditopic ligands for Group 6 transition metal carbonyls
作者:Fiona K. Gormley、Julie Gronbach、Sylvia M. Draper、Anthony P. Davis
DOI:10.1039/a909313c
日期:——
The co-ordination preferences of a family of novel thioethers based on (alkylsulfanylmethyl)benzene were examined. The alkyl chain length and the number and position of the thioether substituents were varied. The ligands were synthesized by coupling the alkanethiol to the appropriate benzyl bromide or via the reaction of benzyl mercaptans with bromoethane; Cs2CO3–DMF was employed as the base–solvent mixture. The molecular structure of hexakis(propylsulfanylmethyl)benzene (L3) and 1,2,4,5-tetrakis(propylsulfanylmethyl)benzene (L4) were obtained at room temperature. Both have a crystallographic centre of symmetry. In L3 the S-propyl substituents (“legs”) alternate “a(bove)” and “b(elow)” the plane of the benzene ring, whereas in L4 the “legs” adopt an abba pattern. Several co-ordination modes of the ligands were observed. Bismetallated tetracarbonyl complexes where the ligand bridges two monometal Group 6 carbonyl fragments (M(CO)4) were generated on reaction of [W(CO)4(MeCN)2] or [Mo(CO)3(MeCN)3] with the ligands L1 and L2. The molecular structures of the resulting complexes [Mo(CO)4}2L] (L = L1 or L2 which are the pentyl analogues of L3 and L4 respectively) show that the conformations of the ligands change radically to accommodate the octahedral geometry about the metal centres. In all cases the metal atoms are chelated by “legs” positioned ortho to each other. Changing the stoichiometry of the reactions does not significantly influence the products.