+++Названия статей

[khimichka]

Здравствуйте!
Помогите, пожалуйста, узнать названия статей!

1. H.M.Graham, E.F.Kurth Ind.Engin.Chem., 41, 409 (1949)

2. J.Gripenberg, Acta.Chem.Scand., 6,1152 (1952)

3. H.V.Breverton, R.C.Cambie. New Zealand J.Sci, 2,95 (1959); Chem.Abstr., 53, 18949 (1959)

4. T.Tominanga. J.Pharm.Soc.Jpn. 80. 1206 (1960)

5. M.Urano,H.Kagawa, Y.Harigaya, S.Li, M.Onda. J.Heterocycl.Chem, 28, 1845 (1991)

6. Е.И.Матросов, Э.Е.Нифантьев, А.А.Крючков, М.И.Кабачник Изв.АН СССР Сер.хим. 1974. С.2818.

Заранее спасибо!

[suprachemister]

название второй искать здесь:

Код: Выделить всё

http://actachemscand.org/

пятой здесь:

Код: Выделить всё

http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1943-5193/issues

шестой:

Код: Выделить всё

http://www.springerlink.com/content/106494/

1
Constituents of extractives from Douglas fir
By Graham, H. M.; Kurth, E. F.
From Journal of Industrial and Engineering Chemistry (Washington, D. C.) (1949), 41, 409-14
With 3 different specimens of Douglas fir heartwood, the Et2O, Me2CO, and cold H2O exts. were examd. One sample contained 9.6% total extractives. From the Et2O ext. oleic, linoleic, lignoceric, and abietic acids, a tannin, and a phytosterol m. 133-4° (acetate m. 125-6°) were isolated. The Me2CO ext. contained a catechol tannin (I), phlobaphene (II), and 3,5,7,3',4'-pentahydroxyflavanone (III) m. approx. 237°, [α]25D 39.8 ± 1° (Me2CO) (Pew, C.A. 42, 8191f); pentaacetate m. 82-5°, Me deriv. m. 159-61° (giving veratric acid on oxidation with KMnO4). Ultraviolet absorption of I, II, and III indicate that these components are structurally related. Data calcd. from a Debye-Scherrer photograph of powd. III are given. The H2O ext. yielded a polysaccharide, [α]20D 23.8 ± 1°, contg. about 81% galactan. Sepns. into the component fractions are described in detail. 25 references.

3
Acetates of dihydroquercetin (taxifolin)
By Brewerton, H. V.; Cambie, R. C.
From New Zealand Journal of Science (1959), 2, 95-8
(±)-Dihydroquercetin (I), m. 239-40°, or (+)-I, m. 235-37°, [α]20D 45° (c 1.0 in 50% Me2CO), 0.0003-0.0005 mole pentaacetylated with 0.1-0.3 mole of Ac2O (II) (a) up to 5 hrs. at 100° to reflux temp. with a catalyst, e.g. fused NaOAc, 1 drop of C5H5N, concd. H2SO4 or 60% HClO4, and (b) 24 hrs. at 35° with 1 drop of C5H5N gave (±)-I pentaacetate (III), m. 152-3° (needles, MeOH). (+)-I pentaacetate, m. 118-19° (needles, EtOH). The tetraacetates were prepd. (a) from 0.0005 mole (±)-I or (+)-I with 0.005 mole III and 2-3 drops C5H5N with stirring 3 min. at room temp. and (b) from III by partial deacetylation with 2N H2SO4 2 hrs. at room temp. (±)-I tetraacetate m. 159-61° (needles, EtOH). (+)-I tetraacetate m. 151-2° (needles, MeOH). Both tetraacetates gave a red color with FeCl3 and were immediately sol. in cold 10% aq. NaOH. The m.ps. of all penta- or tetraacetates were lowered to less than 84° by pptn. from their ethanolic solns., this explained the discrepancies of m.ps. in the literature. The infrared and ultraviolet spectra were recorded.

4
II
By Tominaga, Toshio
From Yakugaku Zasshi (1960), 80, 1206-12.
Hydrolysis of astilbin (I), neoastilbin (II), isoastilbin (III), and neoisoastilbin (IV) with 5% H2SO4 gave one mole each L-rhamnose and dihydroquercetin, the aglycons of I and IV being obtained as the D-trans-type and those of II and III as L-trans-type. I with EtOH-AcONa gave IV and further application of the same reagent to IV gave I. Similarly, II gave III, and vice versa. This change was considered to be a phenomenon arising from inversion of the conformation of 3-OR (R = L-rhamnosyl) by enolization of the CO in the aglycon. Thus, I was (+)-dihydroquercetin 3-L-rhamnoside (V), II was the (-)-analog of V, and IV was probably (+)-epi- or -cis-analog of V.

[khimichka]

Спасибо огромное!!!

Но чего-то я с названием статьи 4 не совсем поняла...

[suprachemister]

Isomerization of Astilbin. II

Код: Выделить всё

http://www.journalarchive.jst.go.jp/english/jnltop_en.php?cdjournal=yakushi1947

[khimichka]

Спасибо!