Disclosed are methods of preparing monoalkyl Group VA metal dihalide compounds in high yield and high purity by the reaction of a Group VA metal trihalide with an organo lithium reagent or a compound of the formula R
n
M
1
X
3−n
, where R is an alkyl, M
1
is a Group IIIA metal, X is a halogen and n is an integer fro 1 to 3. Such monoalkyl Group VA metal dihalide compounds are substantially free of oxygenated impurities, ethereal solvents and metallic impurities. Monoalkyl Group VA metal dihydride compounds can be easily produced in high yield and high purity by reducing such monoalkyl Group VA metal dihalide compounds.
A method of preparing Group VA organometal compounds in high yield and high purity by the reaction of a Grignard reagent with a Group VA metal halide in certain ethereal solvents is provided. A method of preparing Group VA organometal hydrides is also provided.
Derivatives of 4-(trifluoromethyl)-phenol and 4-(trifluoromethylphenyl)-2-(tetrahydropyranyl) ether and method for producing the same
申请人:——
公开号:US20040092754A1
公开(公告)日:2004-05-13
The invention relates to a method for producing 2- and 2,5-substituted derivatives of 4-(trifluoromethyl)-phenol and 4-(2-trifluoromethyl)-phenyl)-2-tetrahydropyranyl) ether and to novel derivatives. Said method is characterised in that a compound of formula (2) 4-(trifluoromethylphenyl)-2-(tetrahydropyranyl) ether is reacted with an electrophile E-X or a combination of electrophiles E-X and E-Y in the presence of a base, X and Y having the meanings given in the description.
Process for the preparation of polyisocyanurate dispersions modified with halogenated alcohols and compositions prepared therefrom
申请人:BASF WYANDOTTE CORPORATION
公开号:EP0056582A1
公开(公告)日:1982-07-28
Polyisocyanurate polymers are prepared by polymerization of polyisocyanates in organic solvents employing trimerization catalysts. The polyisocyanates are reacted with halogenated alcohols subsequent to polymerization. These polymers may be dispersed in polyols for the preparation of cellular and non-cellular polyurethane products having improved flame retardant physical properties.
Process for the preparation of polyisocyanurate dispersions and compositions prepared therefrom
申请人:BASF WYANDOTTE CORPORATION
公开号:EP0056581A1
公开(公告)日:1982-07-28
Polyisocyanurate polymers are prepared by polymerization of polyisocyanates in organic solvents employing trimerization catalysts. The polyisocyanates are reacted with monofunctional active hydrogen compounds prior to polymerization or subsequent to the polymerization. These polymers may be dispersed in polyols for the preparation of cellular and non-cellular polyurethane products having improved physical properties.