The aerial part of D. corymbosum Yielded delcoridine and a new C-19-norditerponoid alkaloid delcorinine. ne structure of delcorinine us established using spectral data and correlation with delcorine and delsoline.
for 14 alkaloids from the roots of Aconitum yesoense var. macroyesoense and of Aconitum japonicum and from the seeds of Delphinium elatum as well as for 25 semisynthetic derivatives. The major alkaloid constituents of A. yesoense var. macroyesoense, kobusine (2) and pseudokobusine (3), a minor alkaloid constituent of A. japonicum, aljesaconitine A (5), and six alkaloid derivatives, N-deethyldelcosine
Delcosine has been assigned tentatively the same C—N skeleton as lycoctonine. In lycoctonine, ring A carries at C-1 a methoxyl group which is directed away from the nitrogen ring. In delcosine, C-1 carries a hydroxyl group which has the opposite configuration and is directed towards the nitrogen. An attempt to correlate the two structures first involves epimerization at C-1 in delcosine. This has been
Application of Liquid Chromatography-Atmospheric Pressure Chemical Ionization Mass Spectrometry to the Differentiation of Stereoisomeric C19-Norditerpenoid Alkaloids.
作者:Koji WADA、Takao MORI、Norio KAWAHARA
DOI:10.1248/cpb.48.660
日期:——
High-performance liquid chromatography-atmospheric pressure chemicalionizationmassspectrometry (HPLC-APCI-MS) was successfully applied to stereoisomeric C19-norditerpenoid alkaloids at position 1. APCI-MS allowed the easy and precise control of the energy deposition by varying the drift voltage. Comparison of the breakdown curves, observed by changing the potential difference between the first electrode
REACTIONS OF OXODELCOSINE AND INTERRELATION OF DELCOSINE AND DELSOLINE
作者:Vinko Skarić、Léo Marion
DOI:10.1139/v60-330
日期:1960.12.1
This result leads to an alteration of the previously suggested structure of delcosine. The new structure suggests a close relationship between delcosine and delsoline which is confirmed by the methylation of the former. The reaction is selective and gives rise to a monomethyldelcosine identical in every way with delsoline. Reduction of the diketo-lactam (didehydro-oxodelcosine) with sodium borohydride
permanganate to anhydrohydroxydelsoline. Oxidation of the alkaloid with mercuric acetate produced anhydrohydroxy-N-de-ethyldelsoline which could be re-ethylated with ethyl iodide, thus showing the presence of an N-ethyl group in delsoline. Anhydrohydroxydelsoline was also obtained from O-acetyldelsoline perchlorate by oxidation to an anhydronium salt followed by hydrolysis with sodium hydroxide, and this method
生物碱delsoline(C 25 H 41 O 7 N)主要被高锰酸酸氧化为脱氢氧代delsoline,并被中性高锰酸根氧化为脱水羟基delsoline。用乙酸汞氧化生物碱产生了脱水羟基-N-去乙基delsoline,可以将其用碘代乙烷重新乙基化,因此表明在delsoline中存在N-乙基。还可以通过将O-乙酰基delsoline高氯酸盐氧化为无水鎓盐,然后用氢氧化钠水解来获得脱水羟基delsoline,这种制备方法提供了其甲醇胺结构的证据。O形Acetyloxodelsoline,从acetyldelsoline获得,由铅四乙酸裂解以一个开环重结晶时失去甲醇元素的二酮。因此,该碱含有两个邻位叔羟基,其中一个为甲氧基的β。脱氢氧代邻苯三酚还可以被四乙酸铅裂解,并且该产物进行内部羟醛重排。这些结果是根据对地索林的初步建议来解释的。