“…Little attention has been paid to synthetic utilization of silanols, since syntheses and isolation of silanols are considered to be difficult due to their instability to moisture, heat, acid, and base. We have recently reported a facile synthesis of silanols that possess a functional group by alkylative cleavage of a cyclic siloxane with organolithium reagents. , Functional group transformations of the obtained silanols are also documented: cyclopropanation of alkenylsilanols, for example, under the conditions of the Simmons−Smith reaction using Et 2 Zn−CH 2 I 2 is accelerated as observed with allylic alcohols. , …”