Procedures followed:
Boratrane
https://scihub.se/10.1016/0022328X(...
https://scihub.se/https://doi.org/10...
Aluminum ethoxide
https://scihub.se/https://doi.org/10...
Triethoxysilane
https://scihub.se/https://doi.org/10...
Hydrosilatrane
https://orgsyn.org/demo.aspx?prep=v98...
https://scihub.se/https://doi.org/10...