translate English to French: The stereochemistry of the hydroborations of 4-tert-butyl-2,2-dimethyl-l-methylenecyclohexane and of 3,3,5-trimethyl-1-methylenecyclohexane has been studied for comparison with that of the hydroboration of 4-tert-butyl-1-methylenecyclohexane which also was examined. cis- and trans-4-tert-butyl-1-hydroxyrnethyl-2,2-dimethylcyclohexane as well as cis- and trans-1-hydroxymethyl-3,3,5-trimethylcyclohexane were obtained in a pure state and their configurations proved by means of the corresponding acids and esters.
Pour fins de comparaison, la stéréochimie de la réaction d'hydroboration du tert-butyl-4 méthylène-1 cyclohexane a aussi été examinée. Les tert-butyl-4 hydroxyméthyl-1 diméthyl-2,2 cyclohexanes cis et trans ainsi que les hydroxyméthyl-1 triméthyl-3,3,5 cyclohexanes cis et trans ont été obtenus à l'état pur et leur stéréochimie respective prouvée par l'intermédiaire des acides et des esters correspondants.