Stereoselective synthesis of (E)-vinylboronic esters via a...

Details Stereoselective synthesis of (E)-vinylboronic esters via a... Stereoselective synthesis of (E)-vinylboronic esters via a...

2008-07-22

2008-07-22

Eyler, Yvonne (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Boron containing

Reexamination Certificate

active

11447486

ABSTRACT:
There is herein provided a process for Zr-mediated hydroboration of alkynes which offers (E)-vinylboronic esters in high yield with stereoselectivity and regioselectivity.

REFERENCES:
patent: 6680401 (2004-01-01), Marcuccio et al.
patent: WO 00/27853 (2000-05-01), None
Schubert Pereira and Morris Srebnik Hydroboration of Alkynes with Pinacolborane Catalyzed by HZrCp2CI. Organometallics 1995, 14,3127-3128.
Wang et al.: “Zr-Mediated hydroboration: stereoselective synthesis of vinyl boronic esters” Tetrahedron Letters, Elsevier, Amsterdam, NL, vol. 46, No. 50, Dec. 12, 2005, pp. 8777-8780, XP005161806.
Beletskaya I. et al: “Hydroborations Catalysed by Transition Metal Complexes” Tetrahedron, Elsevier Science Publishers, Amsterdam, NL, vol. 53, No. 14, Apr. 7, 1997, pp. 4957-5026, XP004105554, chapter 2.6.5, pp. 4997-4999.
Schubert Pereira et al.: “Hydroboration of Alkynes with Pinacolborane Catalyzed by HZrCp2C1” Organometallics, No. 14, 1995, pp. 3127-3128, XP002402266.

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