The analogous butyl compound, syn-butanethial-S-oxide, is found in Allium siculum species.
The process is infamous for its use of the highly toxic reversal agent Tertiary Butyl-Amine Borane (TBAB) (not to be jumbled with Tetra-n-butylammonium bromide which also has TBAB abbr.) – as of all boron hydrides.
Robert McKee Thomas was a co-inventor of butyl rubber, along with William J. Sparks.