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Paper | Regular issue | Vol 27, No. 12, 1988, pp.2863-2873
Published online, 1st January, 1970
DOI: 10.3987/COM-88-4724
New Secoiridoids from Isertia haenkeana

Angel Rumbero-Sánchez and Purificación Vázquez

*Depatramento de Química, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain

Abstract

Eight new secoiridoid glycosides (7R)- and (7S)-haenkeanoside (8) and (9), (7R)- and (7S)-isohaenkeanoside (10) and (11), (7R)- and (7S)-O-methylhaenkeanoside (12) and (13), and (7R)-and (7S)-O-methylisohaenkeanoside (14) and (15), were isolated from leaves of Isertia haenkeana, and their structures have been established on the basis of spectral data and chemical transformations. These compounds are the first report of any coumaroyl secoiridoid morroniside type with a trans- and cis- configuration at acyl double bond. Moreover, compounds 12, 13, 14, and 15 exhibit a methoxy group (C-7) in the aglycone part.