Abstract 1-(5-Hexenyl) piperidine (Ia) and trans-1-(3-hexenyl) piperidine (Ib) were hydroborated with tetrahydrofuran-borane, diborane in situ, 9-borabicyclo [3.3. 1] nonane and triethylamine-borane. The hydroboration products were converted to 1- piperidinylhexanols IIa-IIe by hydrolysis with hydrochloric acid and subsequent oxidation with hydrogen peroxide in an alkaline medium. In addition to the alcohols IIa-IIe, the ...