The Structure of MARQUIS' Nitroacetin.

Clauson-Kaas, Niels; Fakstorp, Jørgen; Sillén, Lars Gunnar; Linnasalmi, Annikki; Laukkanen, Pentti

doi:10.3891/acta.chem.scand.01-0210

Cited by 10 publications

(7 citation statements)

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“…2 h, 235 mL of ice cold water was added. The yellow precipitate was filtered, washed until neutral with cold water and then with CH2C12 (3 X 50 mL), and dried in vacuo over P205 to give 7.74 g (95%) of product: mp 139.5-141 °C (effervescent red liquid); NMR (CDCl3-Me2SO-de) 5 8.15 (m, 2 H, ortho Ar H), 7.9 (s, 1 H, vinyl H), 7.8 (s, 1 H, OH), 7.6 (m, 3 H, meta and para Ar H); IR (KBr) 3150-2400 (s, OH), 1780 (s, C=0), (s, N=C, H bonded with OH) cm"1.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of (E)- and (Z)-cyclopropyl-3-chloroalanine

Bland¹,

Stammer²,

Varughese³

1984

J. Org. Chem.

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Hydrogen atoms of the methyl groups have not been located nor computed. R factors as well as residuals in final difference maps are given in Table IV. The only notable residuals are in the region of disorder of compound (E)-6m.Supplementary Material Available: Tables of bond lengths and bond angles, coordinates, and anisotropic thermal parameters (20 pages). Ordering information is given on any current masthead page.

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Section: Methodsmentioning

confidence: 99%

Synthesis of (E)- and (Z)-cyclopropyl-3-chloroalanine

Bland¹,

Stammer²,

Varughese³

1984

J. Org. Chem.

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“…The Cluuson-Kuus oxidation [35] of the furan moiety of 54 (Br,, Na,CO,, anh. MeOH) generated the isomer mixture 55 (Scheme 5); the crude reaction mixture was hydrogenated (H,, Pd/C, MeOH) and the obtained mixture 56/57 treated with PhCH,NH, and AcOH [36] to provide the I-benzyl-lH-pyrrole derivative 58 in trace amounts [lc].…”

Section: L]hept-5-en-2-onementioning

confidence: 99%

Synthesis of C‐Linked Imino Disaccharides (= Aza‐C‐disaccharides) with a Pyrrolidine‐3,4‐diol Moiety Attached at C(3) of Galactose via a Hydroxymethylene Linker and of a 7‐(1,2,3‐Trihydroxypropyl)‐octahydroxyindolizine‐1,2,6,8‐tetrol

Kraehenbuehl

Picasso

Vogel

1998

Helvetica Chimica Acta

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The lithium enolate of (~)-6-endo-chloro-5-c~xo-(phenylseleno)-7-oxabicyclo[2.2.l]heptan-2-one (16) added to furan-2-carboxaldehyde giving a single aldol 19 (Schemes I and 2) that was converted with high stereoselectivity . After adequate protection (+ 70). selective displacement of one of the mesylate moieties with LiN,, followed by hydrogenation of the corresponding primary azide and intramolecular substitution, led to four protected, stereoisomeric C-linked imino disaccharides (Sclieme 7); the latter were deprotected under acidic conditions to give (

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“…Die UV-Spektren wurden mit den Spektrophotometern VSU-1 bzw. Spekol, die IR-D a r s t e l l u n g v o n 2 , 5 -D i h y d r o -2 , 5d i m e t h o x yf u r a n ( D H D MF) b z TV .s i l v a n (DHDMS) [16] 68,l g (72 ml, 1 Mol) frisch destilliertes Furan, Kp. 32", bzw.…”

Section: Beschreibung Der Versueheunclassified

Zum Mechanismus der Farbreaktion von DNA und 2‐Desoxyribose mit Orcin

Flossmann¹,

Erler²

1971

J. Prakt. Chem.

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Aus 2‐Desoxyribose bildet sich in saurem Medium 3‐Acetylacrolein. Dieses reagiert mit 3,5‐Dihydroxytoluol (Orcin) im Sinne einer aldolartigen Aldehyd‐Phenol‐Kondensation über eine zwischengeschaltete Oxydation zu einer Reihe violetter und blauer Farbstoffe. Die Hauptkomponenten wurden präparativ dünnschichtchromatographisch dargestellt und als 9‐(2‐Acetylvinyl)‐dimethyl‐hydroxy‐3‐isoxanthone 2 und 1‐(Dimethyl‐3‐isoxanthonyl)‐2‐[(dimethyl‐dihydroxy‐9‐methyl‐xanthenyl)‐9]‐äthylene 4 charakterisiert. Die Bildung von 4 erfolgt aus 2 und Orcin. Die Farbstoffe haben den Charakter von Säure‐Base‐Indikatoren mit stark pH‐abhängigen Elektronenspektren. Sie sind in protonisierter Form die Träger der Farbreaktion (2: λmax = 575 nm; 4: λmax = 595 nm).

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The Structure of MARQUIS' Nitroacetin.

Cited by 10 publications

References 0 publications

Synthesis of (E)- and (Z)-cyclopropyl-3-chloroalanine

Synthesis of (E)- and (Z)-cyclopropyl-3-chloroalanine

Synthesis of C‐Linked Imino Disaccharides (= Aza‐C‐disaccharides) with a Pyrrolidine‐3,4‐diol Moiety Attached at C(3) of Galactose via a Hydroxymethylene Linker and of a 7‐(1,2,3‐Trihydroxypropyl)‐octahydroxyindolizine‐1,2,6,8‐tetrol

Zum Mechanismus der Farbreaktion von DNA und 2‐Desoxyribose mit Orcin

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