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Reducing agents that enable high chemo and stereoselective reduction of ketones.

CALSELECT™ offers diversified couterion options to deliver the best results for our partners when working with highly selective functional groups.

CALSELECT Applications

Chemical Synthesis

Hydride reagent that reduces ketones and enones


  • - Pharmaceuticals

The benefits of CALSELECT

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Superior Quality

With over 50 years in the business, Ascensus has perfected the process to ensure batch to batch consistency so our partners know what they are getting every time.

Available Products
  • CALSELECT™ Sodium tri-sec-butylborohydride (CALSELECT Na)
  • CALSELECT™ Lithium tri-sec-butylborohydride (CALSELECT Li)
  • CALSELECT™ Lithium triethylborohydride (CALSELECT LT)
  • CALSELECT™ Sodium triacetoxyborohydride (CALSELECT STAB)
  • CALSELECT™ Lithium Tri-tert-butoxy aluminum hydride (CALSELECT LTBA)

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