A method for producing a fluorine-containing compound represented by General formula (1), wherein X represents a halogen atom or an alkoxy group, R.sup.1 represents a hydrogen atom or a linear, branched, or cyclic alkyl group having 1 to 10 carbon atoms, R.sup.f1 and R.sup.f2 are each independently a fluorinated alkoxy group, and n represents an integer of 0 or more. ##STR00001##

An aqueous solution composition containing a co-hydrolysate or a co-hydrolytic condensate of an organosilicon compound of formula (1) and an organosilicon compound of formula (2), or both the co-hydrolysate and the co-hydrolytic condensate:

##STR00001##

wherein R.sup.1 and R.sup.2 are each independently an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 10 carbon atoms, R.sup.3 is an alkyl group having 12 to 24 carbon atoms, R.sup.4 and R.sup.5 are each independently an alkyl group having 1 to 6 carbon atoms, X is a halogen atom, m is an integer of 1 to 20, and n is an integer of 1 to 3.

An aqueous solution composition containing a hydrolysate or a hydrolytic condensate of an organosilicon compound of formula (1), or both the hydrolysate and the hydrolytic condensate:

##STR00001##

wherein R.sup.1 and R.sup.2 are each independently an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 10 carbon atoms, R.sup.3 is an alkyl group having 12 to 24 carbon atoms, R.sup.4 and R.sup.5 are each independently an alkyl group having 1 to 6 carbon atoms, X is a halogen atom, m is an integer of 4 to 20, and n is an integer of 1 to 3.

A radiation sensitive composition including a siloxane polymer exhibiting phenoplast crosslinking reactivity as a base resin, which is excellent in resolution and can be used as a radiation sensitive composition capable of allowing a pattern having a desired-shape to be formed with sufficient precision. A radiation sensitive composition including as a silane, a hydrolyzable silane, a hydrolysis product thereof, or a hydrolysis-condensation product thereof; and a photoacid generator, in which the hydrolyzable silane includes hydrolyzable silanes of Formula (1)
R.sup.1.sub.aR.sup.2.sub.bSi(R.sup.3).sub.4-(a+b)  Formula (1)
wherein R.sup.1 is an organic group of Formula (1-2) ##STR00001##
and is bonded to a silicon atom through a Si—C bond or a Si—O bond, and R.sup.3 is a hydrolyzable group; and Formula (2)
R.sup.7.sub.cR.sup.8.sub.dSi(R.sup.9).sub.4-(c+d)  Formula (2)
wherein R.sup.7 is an organic group of Formula (2-1) ##STR00002##
and is bonded to a silicon atom through a Si—C bond or a Si—O bond, and R.sup.9 is a hydrolyzable group.

The present invention relates to boron containing compounds of Formula (IA): ##STR00001##
that inhibit phosphodiesterase 4 (PDE4). The invention also encompasses pharmaceutical compositions containing these compounds and methods for treating diseases, conditions, or disorders ameliorated by inhibition of PDE4.

Provided is a surface treatment agent including an alkoxysilane compound having a cyclic silazane structure represented by the following general formula (1): ##STR00001##
wherein R.sup.1 represents an unsubstituted linear alkyl group having 6 to 20 carbon atoms, R.sup.2 represents a substituted or unsubstituted alkylene group having 3 to 6 carbon atoms that may include a heteroatom, R.sup.3 and R.sup.4 each independently represent a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and n represents an integer of 0 or 1.

A method for synthesizing a fluorovinyl ether compound from a fluorine-containing vinyl compound. Specifically, a method for producing a compound represented by formula (1), comprising step A of reacting a compound represented by formula (2) with a compound represented by formula (3) in the presence of a transition metal catalyst: ##STR00001## ##STR00002## ##STR00003##
wherein the substituents are defined in the disclosure.

Compounds, tautomers and pharmaceutically acceptable salts of the compounds are disclosed, wherein the compounds have the structure of Formula Ia, ##STR00001##
as defined in the specification. Corresponding pharmaceutical compositions, methods of treatment, methods of synthesis, and intermediates are also disclosed.

Provided is an organopolysiloxane compound acting as a chain extender for use in a room-temperature-vulcanizing (RTV) composition of a dealcoholization type that can be rapidly turned into a rubber and then exhibit a rubber elasticity. The organopolysiloxane compound is represented by the following general formula (1), and also provided is a composition containing this compound and a linear diorganopolysiloxane with both molecular chain ends being blocked by a silanol group or a hydrolyzable silyl group,

##STR00001##

wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represents a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms; and n is a number of 0 to 10.

Described are methods for preparing a deuterated aldehyde using with a photocatalyst and a hydrogen atom transfer agent in a H.sub.2O free solvent comprising D.sub.2O and an organic solvent under an inert gas. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions.