Patent ID: 8686176
Filing Date: 2014-04-01
Classification: C07F

Abstract:
1. A method for synthesizing a reversibly protected organometallic compound or a reversibly protected silane which comprises (1) reacting an organometallic compound of the structural formula: A x -MX y with a hydroxyl group containing compound having a formula selected from the group consisting of: wherein M represents a member selected from the group consisting of silicon, germanium, tin, lead, titanium, hafnium, and zirconium; wherein A represents an unsaturated hydrocarbyl moiety containing at least one non-aromatic double bond; wherein X represents a halogen atom; wherein x and y represent integers from 1 to 3; wherein the sum of x and y is 4; wherein n represents an integer from 1 to about 20; wherein Z represents a group —C(R)(R 1 )—; wherein R and R 1 can be the same or different and are selected from the group consisting of hydrogen atoms, alkyl groups containing from 1 to about 12 carbon atoms, aryl groups containing from about 6 to about 18 carbon atoms, alkaryl groups containing from 7 to about 18 carbon atoms, alkoxy groups containing from 1 to about 18 carbon atoms, hydroxy groups, and halide atoms; wherein R* is selected from the group consisting of hydrogen atoms, alkyl groups containing from 1 to about 12 carbon atoms, aryl groups containing from about 6 to about 18 carbon atoms, and alkaryl groups containing from 7 to about 18 carbon atoms; wherein R, R 1 , and R* can be bonded together in any combination in cases where R, R 1 , and R* are not hydrogen atoms, halide atoms, or hydroxy groups; wherein Y represents a moiety selected from the group consisting of —C(R)(R 1 )—, oxygen, sulfur, nitrogen, and phosphorus; wherein Z represents a moiety selected from the group consisting of —C(R)(R 1 ), oxygen, sulfur, nitrogen, and phosphorus; with the proviso that Y and Z cannot both represent the moiety —C(R)(R 1 )—; wherein the organometallic compound is reacted with the hydroxyl group containing compound in an organic solvent at a temperature of less than about 100° C. to produce a solution containing the reversibly protected organometallic compound and hydrogen chloride; (2) reacting the solution containing the reversibly protected organometallic compound and the hydrogen chloride with a trialkyl amine to precipitate the hydrogen chloride from the solution to produce a solution of the reversibly protected organometallic compound, wherein step (2) can be carried out concurrently with step (1) or subsequently to step (1); and (3) recovering the reversibly protected organometallic compound from the solution of the reversibly protected organometallic compound.