This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

This application relates, in part, to novel salts represented by the following structure of Formula (1):

##STR00001##

wherein R.sup.1a is selected from the group consisting of hydrogen and optionally substituted alkyl (e.g., unsubstituted C.sub.1-6 alkyl, e.g., —CH.sub.3); R.sup.1b is optionally substituted alkyl (e.g., unsubstituted C.sub.1-6 alkyl, e.g., —CH.sub.3); each occurrence of R.sup.2 and R.sup.3 is independently selected from the group consisting of hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, and optionally substituted aryl; R.sup.2 and R.sup.3 can combine with each other to form optionally substituted cycloalkyl; each m and n is independently an integer ranging from 1 to 20 (e.g., m and n is independently an integer ranging from 1 to 5); and each of Q.sup.1⊖ and Q.sup.2⊖ is independently a counterion (e.g., each of Q.sup.1⊖ and Q.sup.2⊖ is independently a counterion selected from the group consisting of chloride, bromide, fluoride, iodide, acetate, carboxylate, hydrogen sulfate, nitrate, and phenolate, and sulfonate, e.g., chloride), and methods of making the same.

The present technology is directed to polypropionate lactone stereotetrads of Formula (I) (or a pharmaceutically acceptable salt and/or solvate thereof) which are significant intermediates for multiple synthetic applications.

The present technology is directed to polypropionate lactone stereotetrads of Formula (I) (or a pharmaceutically acceptable salt and/or solvate thereof) which are significant intermediates for multiple synthetic applications.

This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

The present technology is directed to polypropionate lactone stereotetrads of Formula (I) (or a pharmaceutically acceptable salt and/or solvate thereof) which are significant intermediates for multiple synthetic applications.

The present technology is directed to polypropionate lactone stereotetrads of Formula (I) (or a pharmaceutically acceptable salt and/or solvate thereof) which are significant intermediates for multiple synthetic applications.

This application relates, in part, to novel salts represented by the following structure of Formula (1): ##STR00001##
wherein R.sup.1a is selected from the group consisting of hydrogen and optionally substituted alkyl (e.g., unsubstituted C.sub.1-6 alkyl, e.g., —CH.sub.3); R.sup.1b is optionally substituted alkyl (e.g., unsubstituted C.sub.1-6 alkyl, e.g., —CH.sub.3); each occurrence of R.sup.2 and R.sup.3 is independently selected from the group consisting of hydrogen, optionally substituted alkyl, optionally substituted cycloalkyl, and optionally substituted aryl; R.sup.2 and R.sup.3 can combine with each other to form optionally substituted cycloalkyl; each m and n is independently an integer ranging from 1 to 20 (e.g., m and n is independently an integer ranging from 1 to 5); and each of Q.sup.1.sup.⊖ and Q.sup.2.sup.⊖ is independently a counterion (e.g., each of Q.sup.1.sup.⊖ and Q.sup.2.sup.⊖ is independently a counterion selected from the group consisting of chloride, bromide, fluoride, iodide, acetate, carboxylate, hydrogen sulfate, nitrate, and phenolate, and sulfonate, e.g., chloride), and methods of making the same.