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Veratrum alkaloids. XXXI. Crystal and molecular structure of dihydroveracintine

F. Pavelčík and J. Tomko

Department of Analytical Chemistry, Faculty of Pharmacy, Komenský University, CS-832 32 Bratislava

 

Abstract:  The structure of steroidal alkaloid veracintine, monoclinic symmetry, space group P21, a = 1.3650 nm, b = 1.3332 nm, с = 1.5298 nm, ß = 97.38°, has been solved by direct methods and refined by the least-squares to an R =0.077 using 1841 independent observed reflections. Two molecules occur in the symmetrically independent part of the unit cell which differ in conformation of the pyrrolidine ring. The absolute configuration is (S) at the asymmetric carbon atom C(20) and (R) at C(25).

Full paper in Portable Document Format: 372a145.pdf

 

Chemical Papers 37 (2) 145–157 (1983)

Tuesday, July 14, 2020

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