Some uses of nuclear magnetic resonance spectroscopy in the structure elucidation of isoquinoline alkaloids
نام عام مواد
[Thesis]
نام نخستين پديدآور
A. J. Freyer
نام ساير پديدآوران
M. Shamma
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
The Pennsylvania State University
تاریخ نشرو بخش و غیره
1988
مشخصات ظاهری
نام خاص و کميت اثر
93
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
The Pennsylvania State University
امتياز متن
1988
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Roemeria refracta of Turkish origin had formerly provided a number of alkaloids suspected of belonging to the pavine-isopavine grouping. As a result of the present effort, it was demonstrated that one of these bases, ()-eschscholtzinone, is the first ketonic pavinoid. ()-Norreframidine is the only naturally occurring N-norisopavine. The new isopavine ()-refractamine, structurally isomeric with the known ()-reframoline, was also characterized. The different di, tetra and hexahydro derivatives of the proaporphine (+)-stepharine, which had previously been obtained through catalytic reduction, were studied by various NMR techniques, thus allowing for specific stereochemical assignments. A number of Roemeria proaporphines alkaloids wre subjected to NMR analyses and their structures elucidated. ()-Roemerialinone, ()-isoorientalinone, ()-isoroemerialinone, ()-11,12-dihydroorientalinone, (+)-8,9-dihydroisoroemerialinone and ()-usd\alphausd-roemehybrine were thus identified. Two previously known alkaloids from R. hybrida, namely ()-roehybridine and ()-roemeridine, were shown to belong to the new class of isoquinoline-indole bases formed by Pictet-Spengler condensation of a ketonic tetrahydroproaporphine with a tryptamine analog. Finally, the NMR spectral characteristics of over 100 bisbenzylisoquinoline alkaloids have been presented in tabular form. The use of this extensive data in the structure elucidation of new bisbenzylisoquinolines has been demonstrated.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
NMR
موضوع مستند نشده
Nuclear chemistry
موضوع مستند نشده
Pure sciences
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )