The present invention relates to a method for preparing silicon-containing heterocycles of the general formula (I) ##STR00001## wherein R.sup.1 is hydrogen; R.sup.2 and R.sup.3 are same or different and are, independently from one another, selected from a linear or branched, substituted or unsubstituted C.sub.1-C.sub.20 alkyl or C.sub.6-C.sub.18 aryl residue which may be interrupted by at least one heteroatom; R.sup.4 is selected from a linear or branched C.sub.1-C.sub.20 alkylene residue which may be interrupted by at least one heteroatom; R.sup.5 and R.sup.6 are same or different and are, independently from one another, selected from the group consisting of hydrogen, a linear or branched, substituted or unsubstituted C.sub.1-C.sub.20 alkyl or C.sub.6-C.sub.18 aryl which may be interrupted by at least one heteroatom, and a C.sub.4-C.sub.8 cycloalkyl, or R.sup.5 and R.sup.6 may form a ring, a 4- to 8-membered alkyl ring; and n is 0, 1 or 2, 2, said method comprising a one-step reaction of at least one epoxide compound of the general formula (II) and at least one aminoalkoxysilane having a primary amino group in the presence of a catalyst ##STR00002## wherein R.sup.5 and R.sup.6 are the same as defined for the general formula (I) above; as well as the use of the silicon-containing heterocycles of the general formula (I).

A process for preparing a cyclic polysiloxazane is disclosed. The cyclic polysiloxazane may optionally be converted to an a-alkoxy-ou-amino-functional polysiloxane. The cyclic polysiloxazane or the a-alkoxy-oo-amino-functional polysiloxane, may be used as a capping agent for a silanol-functional polyorganosiloxane in a process to make an amino-functional polyorganosiloxane.

Disclosed are an intermediate of Eribulin and a preparation method therefor. In particular, disclosed are compounds as represented by formula II, formula III and formula V and a preparation method therefor. Ar is C.sub.1-10 alkyl substituted, alkyloxy substituted or unsubstituted aryl; R.sup.1 and R.sup.2 is an acetal protecting group or a thioacetal protecting group; R.sup.3 is hydrogen or a hydroxyl protecting group; and X is halogen or a leaving group. The preparation method therefor has the advantages of mild reaction conditions, high selectivity, easy purification, low synthesis cost and the like, being suitable for large scale production. ##STR00001##

In various aspects and embodiments the invention provides a method of preparing a cyclopentaoxasilinone, the method comprising contacting a siloxy-tethered 1,7-enyne with a thioether promoter. In another aspect, the invention provides a method of preparing a cyclopentaoxaborininone, the method comprising contacting a boronic ester-tethered 1,7-enyne with a thioether promoter.

The present invention relates to the preparation of compounds of Formula I, including thapsigargin, nortrilobolide and 8-O-debutanoyl-thapsigargin from commercially available (R)-(−)-carvone via synthetic intermediate compound of formula 12 by pinacol coupling and in situ lactonization. ##STR00001##

A composition, a film, a display device and article prepared therefrom, and a method of preparing the article, the composition including: a compound having a fluorine-containing (poly)ether group represented by Formula 1; and a heteroatom-containing cyclic silane compound represented by Formula 2 or 3:

##STR00001## wherein, in Formulas 1 to 3, Rf is a fluorine-containing (poly)ether group, and L1, Q1, p1, q1, q2, q3, A1, A2, A3, R.sub.a, R.sub.b, R.sub.i, R.sub.j, R.sub.c, R.sub.d, R.sub.e, R.sub.f, R.sub.g, R.sub.h, R.sub.k, R.sub.l, R.sub.m, R.sub.n, R.sub.o, R.sub.p, R.sub.q, R.sub.r, R.sub.s, and R.sub.t are as described in the detailed description.

There is provided a silicon compound represented by General Formula (x). There is also provided a reactive material containing a silicon compound represented by General Formula (x). In General Formula (x), in a case where a plurality of R.sup.1's are present, R.sup.1's are each independently a linear alkyl group having 1 to 10 carbon atoms, a branched alkyl group having 3 to 10 carbon atoms, a cyclic alkyl group having 3 to 10 carbon atoms, a linear alkenyl group having 2 to 10 carbon atoms, a branched alkenyl group having 3 to 10 carbon atoms, or a cyclic alkenyl group having 3 to 10 carbon atoms, where all or part of hydrogen atoms in the alkyl group or the alkenyl group may be substituted with a fluorine atom, in a case where a plurality of R.sup.2's are present, R.sup.2's are each independently a linear alkyl group having 1 to 4 carbon atoms or a branched alkyl group having 3 or 4 carbon atoms, where all or part of hydrogen atoms in the alkyl group may be substituted with a fluorine atom, R.sup.A is an acid unstable group; a is an integer of 1 to 3, b is an integer of 0 to 2, and c is an integer of 1 to 3, where a+b+c=4 is satisfied; and n is an integer of 1 to 5.

##STR00001##

Precursors and methods for (a) forming silicon-containing films and (b) functionalizing substrate surfaces in order to generate a germanium seed layer suitable for deposition of Ge films. In one aspect, there is provided a precursor of Formula I and/or a precursor of Formula II:

##STR00001##

##STR00002##

as described herein.

Provided herein are a method of Ru(II)-catalyzed enantioselective synthesis of a cyclic compound and cyclic compounds formed therefrom. The method includes providing a precursor compound having an unfunctionalized C—H bond and activating the unfunctionalized C—H bond by reacting the precursor compound in the presence of co-catalysts including a Ru(II) arene complex and a chiral transient directing group (CTDG).

There is provided herein a method and an apparatus for producing an isocyanatoorganosilane which method includes feeding a carbamatoorganosilane to a cracking device where it is thermally dissociated into a reaction product mixture comprising isocyanatoorganosilane, alcohol, and heavies, followed by separating the mixture in a distillation column of two parts and collecting the isocyanatoorganosilane from the distillation column via a side stream having a predetermined location between the top and bottom parts of the column; and wherein the distillation column is configured to have a ratio of the length of the bottom part of the distillation column to the length of the top part of the distillation column which is effective to provide a side stream having a high purity and high weight percent of isocyanatoorganosilane.