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Two New Cerioptins (A‐B) from the Mangrove Ceriops tagal
Author(s) -
Sura Madhu Babu,
Dangeti Nalini,
Ponnapalli Mangala Gowri
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801975
Subject(s) - heteronuclear molecule , two dimensional nuclear magnetic resonance spectroscopy , heteronuclear single quantum coherence spectroscopy , stereochemistry , chemistry , diterpene , enol , nuclear magnetic resonance spectroscopy , organic chemistry , catalysis
Two novel compounds (1‐2), cerioptins A−B, along with seven known compounds were isolated from the mangrove, Ceriops tagal . These new compounds were characterized as a rare ethyl‐[(2‐allyl‐2‐chloromethyl)‐2H‐1‐benzopyran]‐3‐carboxylate (1) and a novel tetraterpenoid congener of heterodimeric diterpenoid, pimara‐11‐enol‐(16→2′)‐dolabra‐1,4(18),15‐triene (2) by extensive modern spectroscopic 2D NMR [COSY (correlation spectroscopy), NOESY (Nuclear Overhauser Effect Spectroscopy), HSQC (heteronuclear single‐quantum correlation), HMBC (heteronuclear multiple bond correlation)], IR (infrared) and mass data analysis. The naturally occurring new heterodimeric diterpene is derived from two new diterpenes as pimara‐11‐enol and dolabra‐1,4(18),15‐triene.