Direct conversion of thiols and disulfides into sulfonamides
摘要:
The H(2)O(2)-ZrCl(4) reagent system is used as a new and efficient reagent for the conversion of thiols and disulfides into sulfonamides. The protocol offers several advantages such as excellent yields of products and extremely fast reactions at room temperature. The reagent system is very easy to handle and is environmentally safe and economical. (C) 2010 Elsevier Ltd. All rights reserved.
Preparation of acid-labile resins with halide linkers and their utility in solid phase organic synthesis
作者:Khehyong Ngu、Dinesh V. Patel
DOI:10.1016/s0040-4039(96)02502-6
日期:1997.2
preparation of acid-labile resins with displaceable halide linkers (3 and 4, X = BrandI) is described. These resins can be used in combinatorial organic synthesis of numerous drug-scaffold libraries. Their synthetic utility is exemplified by high yielding N-alkylations with structurally and electronically diverse sets of aliphatic and aromatic amines. Amongst the various resins modified and evaluated in
LOW TEMPERATURE, FAST HARDENING COMPOSITION FOR PREPARING PROTECTING FILM, PROTECTING FILM PREPARED THEREFROM, AND SUBSTRATE COMPRISING THE SAME
申请人:Son Jeong-man
公开号:US20100080973A1
公开(公告)日:2010-04-01
The present invention relates to a composition for preparing an excellent protecting film with high strength, wear resistance, and excellent barrier property by low temperature hardening, a protecting film prepared therefrom, a substrate comprising the same, and a component or device comprising the same. The composition comprises an organosiloxane polymer a), a photobase generator b), and an organic solvent c).
METHOD OF FORMING PATTERN AND COMPOSITION FOR FORMING OF ORGANIC THIN-FILM FOR USE THEREIN
申请人:Shimizu Daisuke
公开号:US20100233635A1
公开(公告)日:2010-09-16
A method for forming a pattern contains (1) a step of forming an underlayer film containing (A) a radiation-sensitive acid generator capable of generating an acid upon exposure to radiation rays or (B) a radiation-sensitive base generator capable of generating a base upon exposure to radiation rays on a substrate; (2) a step of irradiating the underlayer film with radiation rays through a mask with a predetermined pattern to obtain an exposed underlayer film portion having been selectively exposed through the predetermined pattern; (3) a step of forming (C) an organic thin film on the underlayer film so as to attain chemical bonding of the exposed underlayer film portion with the organic thin-film formed on the exposed underlayer film portion; and (4) a step of removing the organic thin film formed on areas of the underlayer film other than the exposed underlayer film portion.
A radiation sensitive composition, process for using said composition, and substrates coated with said composition. The photoimageable composition comprises a photobase generator compound, a resin binder and a material capable of crosslinking in the presence of base. In preferred aspects, the invention provides a negative-acting, aqueous developable photoimageable composition comprising a photobase generator compound, a resin binder which preferably is a phenolic polymer, a crosslinking agent that comprises one or more active groups that will undergo base-initiated crosslinking, and a curing agent.
Radiation sensitive compositions, processes for using the compositions, and articles of manufacture comprising the compositions. The photoimageable compositions of the invention comprises a radiation sensitive component, a resin binder and a polybutadiene that comprises one or more internal epoxide groups. In preferred aspects, the compositions off the invention further comprise a crosslinking agent such as a melamine or an epoxidized material, or mixtures thereof.