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Isolaureatin, a constituent from laurencia nipponica yamada

โœ Scribed by Toshi Irie; Motowo Izawa; Etsuro Kurosawa

Publisher
Elsevier Science
Year
1968
Tongue
French
Weight
180 KB
Volume
9
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

In the preceding paper (2) the isolation and structural elucidation of laureatin from Laurencia nipponica Yamada have been reported.

From the same source, we have isolated an isomeric bromo compound, designated as isolaureatin,

which is now assigned structure I on chemical and spectroscopic evidence. Isolaureatin (I), C15H200,tir2 (M+ 394, 392 and 390), m.1'. 83-X4", Ial,, +40ยฐ (CC14), shows in its UV [~'toll~ m*x 223 rnr (C 12,400), Ainfl 229 (10,300,)] and 111 spectra CSikf; 3300, 2150 (CXII), 1133, 1108, 1096 cm-l(C-O-C)] the presence of

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โœ Toshi Irie; Motowo Izawa; Etsuro Kurosawa ๐Ÿ“‚ Article ๐Ÿ“… 1968 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 340 KB

We describe herein the isolation and structural elucidation of a new bromo compound, designated as laureatin, in Laurencia ninoonica Yamada (Japanese name Urasozo; Rhodomelaceae). Laureatin (I), C15H2002Br2 (Mf 394, 392 and 390), m.p. 82-83', la], +96" @X4), was isolated in 0.05% yield by chromatogr

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Red alga, Laurencia nipponica Yamada, is unique in the various biosynthesis of halogenated Cl5 non-terpenoids having the conjugated enyne (2) related to laurediol (3), chamigrene derivatives (4), cuparene derivatives (5) and methylrearranged sesquiterpenoids (6). In our continuing study of the neutr