general approach for the one-pot hydroaminomethylation of olefinsusing methylformate as formylating agent instead of synthesis gas (syngas) has been proposed. Herein we report that a Ru–Rh catalytic system demonstrates high activity in a tandem conversion of a series of n-alkenes into aminesusing methylformate with yields 58–92% (6 h). The selectivity for the normal amine reached 96% with catalysis by
QUATERNARY AMMONIUM SALT-CONTAINING CATALYST FOR DISSOCIATION OF BLOCKING AGENT AND USE THEREOF
申请人:TOSOH CORPORATION
公开号:US20150344727A1
公开(公告)日:2015-12-03
A catalyst containing a quaternary ammonium salt represented by the following general formula (1) is used as a catalyst for dissociation of a blocking agent.
[In the formula, each of R
1
to R
3
represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms or an aromatic hydrocarbon group having 6 to 14 carbon atoms; R
4
represents an aliphatic hydrocarbon group having 9 to 20 carbon atoms; X represents at least one member selected from the group consisting of a phosphate group, a borate group, a hydrogencarbonate group, a monoalkylcarbonate group and a carbonate group; a is an integer in the range of 1 to 3; and b is an integer in the range of 1 to 3.]
Catalyst composition for production of rigid polyurethane foam and isocyanurate-modified rigid polysurethane foam and raw-material composition containing the same
申请人:Tokumoto Katsuml
公开号:US20070112085A1
公开(公告)日:2007-05-17
An object of the present invention is to provide a catalyst for producing a rigid polyurethane foam and an isocyanurate-modified rigid polyurethane foam excellent in storage stability in the case that water is contained as a blowing agent, and a raw material-blended composition using the same. In the present invention, a catalyst composition comprising the following amine compounds of (A) and (B) and/or (C) is used and further, a raw material-blended composition further containing a polyol component and water is used.
(A) A quaternary ammonium salt represented by the following general formula (1):
wherein each of R
1
to R
3
represents a hydrocarbon group having 1 to 12 carbon atoms, R
4
represents an alkyl group or an aromatic hydrocarbon group having 1 to 18 carbon atoms, and X represents an organic acid group having an acid dissociation constant (pKa) of 4.8 or less;
(B) A hydrophobic amine compound; (C) A heterocyclic tertiary amine compound.
Novel families of amine-borane compounds, including fluorinated aminoboranes, novel bis-aminoboranes and aminoboranes having saturated and unsaturated ling alkyl chains are provided. Processes of preparing, pharmaceutical compositions and methods utilizing these novel compounds are also provided. Radiolabeled aminoboranes and uses thereof in radioimaging (e.g., PET) and radiotherapy are further provided.