Glucose→Xn-hexane; ‘X’ in the reaction is
HCN
NH2OH
LiAlH4
HI+Red P/1500c
HI+Red P/1500 c can reduce
a -OH→-H ; b-CHO→-CH3; c-CO-→-CH2-; d-COOH→-CH3; Thus OHC-CHOH4-CH2OH→H3C-CH24-CH3;