Description General description R-Alpine-Borane® is a chiral reducing agent, synthesized from (+)-α-pinene via hydroboration.[5][6] Application R- and S-Alpine-Boranes are used for asymmetric reduction of aldehydes[1][4] and prochiral ketones.[2][3][4] R-Alpine-Borane® solution may be used to prepare: • (R)-5-(Benzyloxy)pent-3-y-2-ol, an intermediate for the stereoselective total synthesis of (-)-stagonolide D.[7] • (R)-1-(p-Tolyl)-1-pentyn-3-ol, an intermediate for the enatioselective synthesis of (R)-incrustoporin.[8] • N-(tert-Butyloxycarbonyl)-(4S)-[4-2H]-1-L-homoserine tert-butyl ester, an intermediate for synthesizing (4S)-[4-2H]-L-homoserine.[9] Packaging 100 mL in Sure/Seal™ Legal Information Alpine-Borane is a registered trademark of Sigma-Aldrich Co. LLC