Neues Verfahren zur Herstellung von 3-Stellung funktionalisierten Organosilanen
申请人:Degussa-Hüls Aktiengesellschaft
公开号:EP0963993A2
公开(公告)日:1999-12-15
Die vorliegende Erfindung betrifft ein neues Verfahren zur Herstellung von in 3-Stellung funktionalisierten Organosilanen durch die Umsetzung von geeigneten Allylverbindungen mit Hydrogensilanen unter Verwendung von Platinkatalysatoren, die einen oder mehrere schwefelhaltige Liganden besitzen.
The invention provides anti-thiol reagents which inhibit enzyme activity of cell-associated protein disulfide isomerase (PDI) by oxidizing or blocking PDI active site vicinal thiol groups which normally participate in disulfide bond rearrangement of PDI substrates. Inhibition of this PDI function is particularly useful in blocking PDI-mediated entry of HIV or other virions into a host cell, as well as inhibiting lymphocyte traffic through the lymph nodes. The invention further provides an assay for the identification of such PDI inhibitors based on the discovery that inhibitors of the invention also induce shedding of the leucocyte L-selectin adhesion molecule. The invention additionally provides for suppression of inflammation and of lymph node entry by calmodulin antagonists that, like PDI inhibition, cause leukocyte L-selectin shedding.
Intramolecular addition of a dioxolanyl radical to the indole nucleus: preparation of enantiomerically pure, oxygenated perhydro-3H-pyrrolo[1,2-a]indoles
作者:Frederick E. Ziegler、Patrick G. Harran
DOI:10.1021/jo00062a019
日期:1993.5
The cyclization of dioxolanyl radicals, which were generated by the Barton tartrate-derived thiohydroxamate ester (mixed anhydride) procedure, with an indole nucleus has been explored. The products derived from these reactions have been identified and their chemistry investigated with the goal of uncovering new entries into enantiomerically pure, mitomycin-like structures. Thus, the photolysis of 1-hydroxy-2-thiopyridone ester 8c and 1-hydroxy-4-methylthiazole-2(3H)-thione ester gd has been conducted with UV and visible light. The photochemistry of the products, namely, dimer 9, dihydroindole 12a, indole 11, and thiazole 13c, derived from the thiohydroxamate esters and putative intermediates 18a and 18b, was also explored.
WO2006/85815
申请人:——
公开号:——
公开(公告)日:——
MERCAPTOTHIAZOLES: OXIDATION AND ALKYLATION STUDIES