The invention provides a method for producing a triorganosilane compound which includes (1) a step of reacting a diorganosilane compound represented by the formula (I):

##STR00001##

with a triflating reagent to obtain a monotriflate compound represented by the formula (III):

##STR00002##

and (2) a step of reacting the monotriflate compound obtained in the step (1) with a metal reagent represented by R.sup.3Li or R.sup.3MgX to obtain a triorganosilane compound represented by the formula (II):

##STR00003##

wherein R.sup.1, R.sup.2 and R.sup.3 are as defined herein.

The present disclosure is directed to methods of silylating organic substrates containing C—H or O—H bonds. In some embodiments, the methods use compositions that are derived from the preconditioning of mixtures of hydrosilanes or organodisilanes with bases, including metal hydroxide, metal alkoxide, metal silanoates, potassium amides, and/or graphitic potassium bases.

The present disclosure is directed to methods for dehydrogenatively coupled hydrosilanes and alcohols, the methods comprising contacting an organic substrate having at least one organic alcohol moiety with a mixture of at least one hydrosilane and sodium and/or potassium hydroxide, the contacting resulting in the formation of a dehydrogenatively coupled silyl ether. The disclosure further described associated compositions and methods of using the formed products.

A compound that is 2,2,4,4-tetrasilylpentasilane, chemical compositions comprising same, methods of making and purifying 2,2,4,4-tetrasilylpentasilane, the purified 2,2,4,4-tetrasilylpentasilane prepared thereby, and methods of forming silicon-containing materials using 2,2,4,4-tetrasilylpentasilane as a precursor.

Objects of the present invention are to provide a novel functional silicon-containing polymer compound to which a property capable of controlling fluidity by a light stimulus is imparted and to provide a method capable of efficiently synthesizing such a polymer compound while maintaining molecular stability. Provided is a polymer compound characterized by having a backbone structure consisting of a silicon-containing polymer, and having N number of partial structures represented by the following formula (1) at the end or side chain of the backbone structure, N being 2 or more.

##STR00001##

(In the formula, * represents a linking point with the backbone structure; L is a direct bond, a silicon-containing spacer group or a C.sub.1-C.sub.5 alkylene group; R.sup.a is independently a C.sub.1-C.sub.5 alkyl group; R.sup.1 is 1 to 4 substituents, which are the same or different, independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, and an alkyl group, an alkenyl group, an aryl group, a sulfo group, a carboxy group, an ester group, a thioester group, a dithioester group, a carbonate group, a thiocarbonate group, a dithiocarbonate group, a trithiocarbonate group, a carbamate group, a thiocarbamate group, a dithiocarbamate group, an ether group, a hydroxy group, a thiol group, a sulfide group, a disulfide group, a silyl group, an amino group, or an amide group, each of which is optionally substituted; and R.sup.2 and R.sup.3 are each 1 to 5 substituents, which are the same or different, independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, and an alkyl group, an alkenyl group, an aryl group, a sulfo group, a carboxy group, an ester group, a thioester group, a dithioester group, a carbonate group, a thiocarbonate group, a dithiocarbonate group, a trithiocarbonate group, a carbamate group, a thiocarbamate group, a dithiocarbamate group, an ether group, a hydroxy group, a thiol group, a sulfide group, a disulfide group, a silyl group, an amino group, or an amide group, each of which is optionally substituted.)

The present disclosure describes methods for silylating aromatic organic substrates, and associated chemical systems, said methods comprising or consisting essentially of contacting the aromatic organic substrate with a mixture of (a) at least one organosilane and (b) at least one strong base, under conditions sufficient to silylate the aromatic substrate.

The present invention is directed to compositions for silylating organic substrates containing C—H or O—H bonds, especially heteroaromatic substrates. The compositions are derived from the preconditioning of mixtures of hydrosilanes or organodisilanes with bases, including metal hydroxide and metal alkoxide bases. In some embodiments, the preconditioning results in the formation of reactive silicon hydride species.

Objects of the present invention are to provide a novel functional silicon-containing polymer compound to which a property capable of controlling fluidity by a light stimulus is imparted and to provide a method capable of efficiently synthesizing such a polymer compound while maintaining molecular stability. Provided is a polymer compound characterized by having a backbone structure consisting of a silicon-containing polymer, and having N number of partial structures represented by the following formula (1) at the end or side chain of the backbone structure, N being 2 or more. ##STR00001##
(In the formula, * represents a linking point with the backbone structure; L is a direct bond, a silicon-containing spacer group or a C.sub.1-C.sub.5 alkylene group; R.sup.a is independently a C.sub.1-C.sub.5 alkyl group; R.sup.1 is 1 to 4 substituents, which are the same or different, independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, and an alkyl group, an alkenyl group, an aryl group, a sulfo group, a carboxy group, an ester group, a thioester group, a dithioester group, a carbonate group, a thiocarbonate group, a dithiocarbonate group, a trithiocarbonate group, a carbamate group, a thiocarbamate group, a dithiocarbamate group, an ether group, a hydroxy group, a thiol group, a sulfide group, a disulfide group, a silyl group, an amino group, or an amide group, each of which is optionally substituted; and R.sup.2 and R.sup.3 are each 1 to 5 substituents, which are the same or different, independently selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, and an alkyl group, an alkenyl group, an aryl group, a sulfo group, a carboxy group, an ester group, a thioester group, a dithioester group, a carbonate group, a thiocarbonate group, a dithiocarbonate group, a trithiocarbonate group, a carbamate group, a thiocarbamate group, a dithiocarbamate group, an ether group, a hydroxy group, a thiol group, a sulfide group, a disulfide group, a silyl group, an amino group, or an amide group, each of which is optionally substituted.)

An object of the present invention is to provide a monomer having a polysiloxane structure and capable of providing a polymer having sufficient compatibility and hydrolysis resistance while having high oxygen permeability useful for an ophthalmic device, and a method for producing the monomer. The present invention provides a compound represented by the formula (1) which has a radical-polymerizable group at one terminal, one to three alkylsiloxy groups having a hydrophilic and bulky group represented by formula (3-A) or formula (3-B), and has a divalent hydrocarbon group L which has 2 to 20 carbon atoms and may contain one or more selected from an ether bond and a urethane bond, a part of hydrogen atoms bonded to the carbon atoms may be substituted with a hydroxyl group.

A method for preparing a product includes combining starting materials including A) a siloxane oligomer having silicon bonded hydrogen atoms, B) an alkoxysilane having at least one aliphatically unsaturated group capable of undergoing hydrosilylation reaction and C) an iridium complex catalyst. The method can be used to produce a compound of formula (I). This compound can be used in a hydrosilylation reaction with a vinyl-functional polyorganosiloxane. The resulting product includes an ethyltrimethoxysilyl functional polyorganosiloxane useful in condensation reaction curable sealant compositions. ##STR00001##