Preparation of organosilicon compounds with carboxy functionality

A process for preparing a carboxy-functional organosilicon compound, the process comprising:

• forming an aldehyde-functional organosilicon compound before step I) by a process comprising combining, under conditions to catalyze hydroformylation reaction, starting materials comprising,
• (A) a gas comprising hydrogen and carbon monoxide,
• (B) an alkenyl-functional organosilicon compound, and
• (C) a rhodium/bisphosphite ligand complex catalyst, where the bisphosphite ligand has formula
• where
• R6 and R6′ are each independently selected from the group consisting of hydrogen, an alkyl group of 1 to 20 carbon atoms, a cyano group, a halogen group, and an alkoxy group of 1 to 20 carbon atoms;
• R7 and R7′ are each independently selected from the group consisting of an alkyl group of 3 to 20 carbon atoms, and a group of formula —SiR173, where each R17 is an independently selected monovalent hydrocarbon group of 1 to 20 carbon atoms;
• R8, R8′, R9, and R9′ are each independently selected form the group consisting of hydrogen, an alkyl group, a cyano group, a halogen group, and an alkoxy group, and
• R10′, R11, and R11′ are each independently selected from the group consisting of hydrogen or and alkyl group;
• thereby forming a hydroformylation reaction product comprising the aldehyde-functional organosilicon compound;
• and thereafter
• I) combining, under conditions to conduct oxidation reaction, starting materials comprising the aldehyde-functional organosilicon compound and an oxygen source, thereby forming an oxidation reaction product comprising the carboxy-functional organosilicon compound.