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Complete Assignment of the 1H and 13C NMR Spectra of Steroidal Sapogenins: Smilagenin and Sarsasapogenin

✍ Scribed by Pawan K. Agrawal; Pensri Bunsawansong; Gareth A. Morris

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 257 KB
Volume: 35
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199707)35:7<441::aid-omr104>3.0.co;2-q

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✦ Synopsis

Ab initio proton and 13C NMR assignments for a stereoisomeric pair of 5b steroidal sapogenins, smilagenin (1) and sarsasapogenin (2), were accomplished using DEPT, COSY, TOCSY, HETCOR, HMQC, HMQC-TOCSY, HSQC-RELAY, HMBC and selective reverse INEPT techniques ; the 13C NMR assignments for 2 were con-Ðrmed using 2D INADEQUATE experiments. This work corrects earlier 13C assignments for 1 and 2 proposed by Eggert and Djerassi.

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