Kulinkovich Reaction 

The Kulinkovich Reaction allows the preparation of cyclopropanol derivatives by the reaction of Grignard reagents with carboxylic esters in the presence of titanium(IV) isopropoxide.
Reaction mechanism:
1. Dialkylation of the titanium catalyst with two equivalents of ethylmagnesium bromide.
2. β-hydride elimination gives ethane and titanacyclopropane.
3. This titanacyclopropane reacts with the carboxylic ester to produce a cyclopropanol derivative.
4. Addition of ethylmagnesium bromide to the titanium complex delivers the magnesium cyclopropoxide product while regenerating the diethyltitanium intermediate.
5. Aqueous/acidic workup yields the 1-cyclopropanol product.
References:
NROChemistry: nrochemistry.c...
Example #1: Angew. Chem. Int. Ed. 2018, 57, 15209. doi.org/10.100...
Example #2: Angew. Chem. Int. Ed. 2022, 61, e202115633. doi.org/10.100...
Example #3: Org. Process Res. Dev. 2021, 25, 2351. doi.org/10.102...