lannaconitine

Bezeichnung:lannaconitine

CAS-Nr32854-75-4

Englisch Name:lannaconitine

CBNumberCB3235290

SummenformelC32H44N2O8

Molgewicht584.7

MOL-Datei32854-75-4.mol

lannaconitine physikalisch-chemischer Eigenschaften

Schmelzpunkt	217-218°
alpha	D18 +27° (chloroform)
Siedepunkt	641.72°C (rough estimate)
Dichte	1.1897 (rough estimate)
Brechungsindex	1.6260 (estimate)
storage temp.	Store at 2-8°C, protect from light
Löslichkeit	Chloroform: 30 mg/ml
Aggregatzustand	A solid
pka	12.55±0.70(Predicted)
Stabilität	Hygroscopic

Sicherheit

Toxizität

LD50 in mice (mg/kg): 6.9 i.v.; 9.1 i.p.; approx 20 orally (Dybing)

Gefahreninformationscode (GHS)

lannaconitine Chemische Eigenschaften,Einsatz,Produktion Methoden

Beschreibung
A highly toxic aconitine alkaloid present in Aconitum leucostomum and A. septentrionale Koelle, lappaconitine crystallizes in hexagonal tablets for whichtwo melting points have been recorded. It has [α]_D + 22.3° (C6H6) or [α]¹⁸_D + 27.0° (CHC1 3). The early view that a methylimino group is present has been shown to be erroneous. No crystalline salts are known but the diacetyl derivative forms colourless crystals, m.p. l25-7°C. The base is only sparingly soluble in H20 and most organic solvents, but dissolves readily in CHC1 3.
Boiling the alkaloid with dilute H2S04 in a stream of H2 yields acetic acid and anthranoyllappaconine, C30H4207N2, which forms colourless rhombic tablets, m.p. 146-9°C;[α]²⁵_D + 22.07° (C6H6), giving a platinichloride tetrahydrate as brown needles, m.p. 300-31 O°C (dec.). When hydrolyzed with HCl, the base furnishes acetic and anthranilic acids and lappaconine, m.p. 96°C; [α]²⁵_D + 22.41°, giving a crystalline hydrochloride, m.p. 246-7°C and the aurichloride monohydrate, m.p. l26-7°C. Alkaline hydrolysis, on the other hand, furnishes lappaconine and lappaconitic acid (acetylanthranilic acid). From these observations, it is clear that only one hydroxyl group is associated with an acyl group in the molecule.
Pharmacologically, lappaconitine is toxic although its action is less pronounced than that of aconitine (q.v.). Toxic doses produce respiratory paralysis and have a direct action upon the heart often terminating in ventricular fibrillation.
Verwenden
(+)-Lappaconitine is a potential antitumor agent agent that induces HL-60 differentiation and apoptosis with analgesic activity as well.
Einzelnachweise
Schultze, Ulfert., Arch. Pharrn., 260,230 (1922)
Weidemann., Chern. Zentr., 1,603 (1923)
Khaimova et al., Tetrahedron Lett., 2711 (1964)
Structure:
Tel'nov, Yunusov, Yunusov., Khirn. Prir. Soedin., 6, 583 (1970)
Pharmacology:
Rosendahl., quoted by Boehm,!. BioI. Chern., 170,203 (1947)

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