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Reconfirmation of the structure of (+)‐retamine from Lygos raetam Var. sarcocarpa by X‐ray analysis
Author(s) -
AbdelHalim Osama B.,
Sekine Toshikazu,
Halim Ahmed F.,
AbdelFattah Hosny,
Saito Kazuki,
Ogata Koreharu,
Murakoshi Isamu
Publication year - 1995
Publication title -
phytochemical analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 72
eISSN - 1099-1565
pISSN - 0958-0344
DOI - 10.1002/pca.2800060606
Subject(s) - chemistry , intermolecular force , hydrogen bond , crystal structure , crystallography , spectroscopy , x ray , nuclear magnetic resonance , molecule , organic chemistry , nuclear physics , physics , quantum mechanics
The structure of (+)‐retamine (1), which has been isolated from the aerial part of Lygos raetam var. sarcocarpa , has been reconfirmed by spectroscopic methods including two‐dimensional nuclear magnetic resonance spectroscopy and x‐ray analysis to be (+)‐12 α‐hydroxysparteine. The configuration of the hydroxyl group at the position 12 in (+)‐retamine and the intermolecular hydrogen bond in the crystal structure of (+)‐retamine have been established.