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Your search keyword '"H. Takayama"' showing total 2 results
Start Over Author "H. Takayama" Region philippines
2 results on '"H. Takayama"'

1. Isolation of pandamarilactonine-H from the roots of Pandanus amaryllifolius and synthesis of epi-pandamarilactonine-H.

Author

Tan MA, Kitajima M, Kogure N, Nonato MG, and Takayama H

Subjects
Alkaloids chemical synthesis, Alkaloids chemistry, Lactones chemical synthesis, Lactones chemistry, Molecular Structure, Nuclear Magnetic Resonance, Biomolecular, Philippines, Plant Roots chemistry, Pyrrolidines chemical synthesis, Pyrrolidines chemistry, Stereoisomerism, Alkaloids isolation & purification, Lactones isolation & purification, Pandanaceae chemistry, Pyrrolidines isolation & purification
Abstract

A new alkaloid (1a), named pandamarilactonine-H, which possesses a methyl-2-(pyrrolidin-2-yl)acetate function, was isolated from the roots of Pandanus amaryllifolius. Eleven known alkaloids were also isolated. Unambiguous assignment of the structure of 1a, including the absolute configuration, was accomplished by spectroscopic analysis and total synthesis of its enantiomer.

Published
2010
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2. Isolation and structure elucidation of two new alkaloids, pandamarilactonine-C and -D, from Pandanus amaryllifolius and revision of relative stereochemistry of pandamarilactonine-A and -B by total synthesis.

Author

Takayama H, Ichikawa T, Kitajima M, Nonato MG, and Aimi N

Subjects
Alkaloids chemical synthesis, Alkaloids isolation & purification, Indicators and Reagents, Magnetic Resonance Spectroscopy, Molecular Conformation, Philippines, Pyrrolidines isolation & purification, Spectrometry, Mass, Fast Atom Bombardment, Spectrophotometry, Ultraviolet, Stereoisomerism, Alkaloids chemistry, Organophosphorus Compounds chemical synthesis, Pandanaceae chemistry, Propionates chemical synthesis, Pyrrolidines chemistry
Abstract

Two new pyrrolidine alkaloids, pandamarilactonine-C and -D, were isolated from Pandanus amaryllifolius. Based on the total synthesis of pandamarilactonine-C and its related alkaloid, pandamarilactonine-A, the relative stereochemistry of pandamarilactonine-A and -B, which was previously proposed by spectroscopic analysis, was revised.

Published
2002
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