Cobalt-Catalyzed Tandem Radical Cyclization/C–C Coupling Initiated by Directed C–H Activation
作者:Qiao Sun、Naohiko Yoshikai
DOI:10.1021/acs.orglett.9b01846
日期:2019.7.5
A cobalt–N-heterocyclic carbene catalyst promotes a tandem radical cyclization/C–Ccoupling reaction between tosylamide-tethered bromo-alkenes and aryl N–H imines initiated by chelation-assisted arene C–Hactivation, affording 3-(arylmethyl)pyrrolidine derivatives in moderate to good yields. The reaction tolerates a variety of substituents on the aryl imine as well as various modifications on the bromo-alkene
Crosslinkers for improving stability of polyurethane foams
申请人:Vedage Gamini Ananda
公开号:US20080090922A1
公开(公告)日:2008-04-17
A composition for making a polyurethane foam includes a non-fugitive tertiary amine urethane catalyst and an alkylated polyamine crosslinking additives. Foams prepared from the reaction of a polyol and an organic isocyanate in the presence of these ingredients show improved resistance to deterioration of physical properties upon humid aging.
POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIAL, AND APPLICATION FOR SAME
申请人:Mitsui Chemicals, Inc.
公开号:EP3168246A1
公开(公告)日:2017-05-17
Provided is a polymerizable composition for an optical material including (A) an amine having two or more secondary amino groups, (B) an isocyanate having two or more isocyanato groups, and (C) a thiol having three or more mercapto groups, in which the ratio (a/b) of the molar number a of amino groups in the amine (A) with respect to the molar number b of isocyanato groups in the isocyanate (B) is in the range of 0.10 to 0.60.
本发明提供了一种用于光学材料的可聚合组合物,包括 (A) 具有两个或两个以上仲氨基的胺,(B) 具有两个或两个以上异氰酸酯基团的异氰酸酯,以及 (C) 具有三个或三个以上巯基的硫醇,其中胺 (A) 中氨基的摩尔数 a 与异氰酸酯 (B) 中异氰酸酯基团的摩尔数 b 之比 (a/b) 在 0.10 至 0.60 之间。
POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIAL AND USE THEREOF
申请人:Mitsui Chemicals, Inc.
公开号:EP3168247A1
公开(公告)日:2017-05-17
Provided is a polymerizable composition for an optical material including (A) a bifunctional amine having two secondary amino groups, (B) a bifunctional thiol having two mercapto groups, and (C) a bifunctional isocyanate having two isocyanato groups, in which the ratio ((a+b)/c) of the total molar number (a+b) of the molar number a of amino groups in the amine (A) and the molar number b of mercapto groups in the thiol (B) with respect to the molar number c of isocyanato groups in the isocyanate (C) is in the range of 0.85 to 1.15, and the ratio (a/c) of the molar number a of amino groups in the amine (A) with respect to the molar number c of isocyanato groups in the isocyanate (C) is in the range of 0.10 to 0.60.
本发明提供了一种用于光学材料的可聚合组合物,该组合物包括 (A) 具有两个仲氨基的双官能团胺,(B) 具有两个巯基的双官能团硫醇,以及 (C) 具有两个异氰酸酯基团的双官能团异氰酸酯、其中胺(A)中氨基的摩尔数 a 和硫醇(B)中巯基的摩尔数 b 与异氰酸酯(C)中异氰酸基的摩尔数 c 的总摩尔数 (a+b)/c) 之比((a+b))在 0.胺(A)中氨基的摩尔数 a 与异氰酸酯(C)中异氰酸基的摩尔数 c 之比(a/c)的范围为 0.10 至 0.60。
Polymerizable composition for optical material and use thereof
申请人:MITSUI CHEMICALS, INC.
公开号:US10308756B2
公开(公告)日:2019-06-04
Provided is a polymerizable composition for an optical material including (A) an amine having two or more secondary amino groups, (B) an isocyanate having two or more isocyanato groups, and (C) a thiol having three or more mercapto groups, in which the ratio (a/b) of the molar number a of amino groups in the amine (A) with respect to the molar number b of isocyanato groups in the isocyanate (B) is in the range of 0.10 to 0.60.
本发明提供了一种用于光学材料的可聚合组合物,包括 (A) 具有两个或两个以上仲氨基的胺,(B) 具有两个或两个以上异氰酸酯基团的异氰酸酯,以及 (C) 具有三个或三个以上巯基的硫醇,其中胺 (A) 中氨基的摩尔数 a 与异氰酸酯 (B) 中异氰酸酯基团的摩尔数 b 之比 (a/b) 在 0.10 至 0.60 之间。