C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 5/02 (2006.01) C07C 29/143 (2006.01) C07D 215/14 (2006.01) C07D 215/18 (2006.01) C07D 495/04 (2006.01)
Patent
CA 2195776
The present invention relates to an improved process for the in situ preparation of diisopinocampheylchloroborane which comprises reacting sodium borohydride and boron trichloride with .alpha.-pinene. The diisopinocampheylchloroborane thus obtained may be used, without isolation, to reduce prochiral ketones to their corresponding alcohols in high optical purity.
Nouveau procédé de préparation in situ du diisopinocamphéylchloroborane consistant à faire réagir de l'hydrure de bore et du trichlorure de bore avec une alpha -pinène. Le diisopinocamphéylchloroborane ainsi obtenu peut servir, sans devoir être isolé, à réduire les cétones prochirales à leur alcools correspondants de grande pureté optique.
King Anthony On-Ping
Larsen Robert D.
Verhoeven Thomas R.
Zhao Mangzhu
Goudreau Gage Dubuc
Merck & Co. Inc.
Merck Sharp & Dohme Corp.
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