Lewis acid-mediated alkylations of N,O-acetals and applications to the total syntheses of alkaloids by Lu, Yongna

“…In Chapter four, the first asymmetric synthesis of the sedum alkaloid sedinine 4-2 has been successfully achieved, employing silver-catalyzed allene cyclization and ring closing metathesis to form a bicyclic N,O-acetal 4-33. …”
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Synthesis of 3-amino-2,3-dideoxysugars with their applications and total synthesis of pyridone alkaloids by Ding, Feiqing

“…Thirdly, a diverted total synthesis (DTS) approach to the total syntheses of pyridone alkaloids N-deoxymilitarninone A and Torrubiellone Bhas been developed. …”
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Synthesis of tricyclic marine alkaloids, cylindricines, lepadiformines, fasicularin, and polycitorols : a recent update by Kaga, Atsushi, Chiba, Shunsuke

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A Preliminary Qualitative Study Of An Alkaloid In The Fruit Of Terong Belanda (Cyphomandra betacea, Cav) by Perpustakaan UGM, i-lib

“…Finally one fraction, fraction D, obtaining in white sharp crystals, 96 mg, m.p 117.5 °C gave positive results to an alkaloid especially from the group of atropine. Keywords: terong belanda, qualitative analysis, alkaloid…”

Pengaruh manipulasi media terhadap kandungan alkaloid steroid dalam kalus Solanum aculeatissimum by Perpustakaan UGM, i-lib

“…This work was done as an effort for obtaining a steroidal alkaloid through tissue culture which is expected gaining a larger amount of steroidal alkaloid. …”

Pengaruh manipulasi media terhadap kandungan alkaloid dalam kalus solanum aculeatissimum Jacq by , HANANI, Endang, , Prof.Ir. Moeso Suryowinoto

Bioassay-guided isolation of antimicrobial active alkaloids from Ruta angustifolia (L.) Pers by Mohd Kamal, Laina Zarisa, Mohd Hassan, Norazian, Md Taib, Nurhaya, May Khin, Soe

“…The anthranilic acid derived alkaloid especially quinoline, furoquinoline, acridone and 4-quinolone alkaloids are the common types of antimicrobial active alkaloids found in Rutaceae. …”
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DETECTION OF ALKALOID, FLAVONOID, AND TERPENOID COMPOUNDS IN BREAD (Artocarpus communis Forst.) LEAVES AND PULPS by Kristanti, Handriani, Tunjung, Woro Anindito Sri

“…The result indicated that alkaloid were detected in chloroform extracts of leaves with Rf score 0.76 and methanol extracts with Rf 0.8, while the alkaloid in pulps weren’t detected. …”
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Isolation of major alkaloids from Mitragyna Speciosa (Kratom) / Mohd Firdaus Ahmad Akhibi by Ahmad Akhibi, Mohd Firdaus

“…However, the structure of the alkaloid cannot be elucidated due to the presence of other contaminants in an alkaloid sample.…”

IDO1 and TDO inhibitory evaluation of analogues of the marine pyrroloiminoquinone alkaloids: Wakayin and Tsitsikammamines by Levy, T, Marchand, L, Stroobant, V, Pilotte, L, Van den Eynde, B, Rodriguez, F, Delfourne, E

“…A number of analogues of the marine pyrroloquinoline alkaloids tsitsikammamines or wakayin have been synthesized, two of them were synthesized using an original method to build the bispyrroloquinone framework. …”

Fungal indole alkaloid biogenesis through evolution of a bifunctional reductase/Diels-Alderase by Dan, Q, Newmister, SA, Klas, KR, Fraley, AE, McAfoos, TJ, Somoza, AD, Sunderhaus, JD, Ye, Y, Shende, VV, Yu, F, Sanders, JN, Brown, WC, Zhao, L, Paton, RS, Houk, KN, Smith, JL, Sherman, DH, Williams, RM

“…Prenylated indole alkaloids such as the calmodulin-inhibitory malbrancheamides and anthelmintic paraherquamides possess great structural diversity and pharmaceutical utility. …”

New polyhydroxylated pyrrolizidine alkaloids from Muscari armeniacum: structural determination and biological activity by Asano, N, Kuroi, H, Ikeda, K, Kizu, H, Kameda, Y, Kato, A, Adachi, I, Watson, A, Nash, R, Fleet, G

The effects of the pyrrolizidine alkaloid, heliotrine, and nicotinamide on the concentration of plasma insulin and blood glucose in the rat. by Schoental, R, Frayn, K

Catalytic stereoselective total synthesis of a spiro-oxindole alkaloid and the pentacyclic core of tryptoquivalines by Wei, T, Dixon, D

“…An expedient route to the pentacyclic core of the tryptoquivaline alkaloids and the total synthesis of natural product (+)-3′-(4-oxoquinazolin-3-yl)spiro[1H-indole-3,5′-oxolane]-2,2′-dione (1) have been achieved. …”

Unusual indole alkaloid—epyrrole, —epyrone, and —carbamic acid adducts from Alstonia angustifolia by Kam, Toh Seok, Tan, S.J., Choo, Y.M., Thomas, N.F., Robinson, W.T., Komiyama, K.

“…Three unusual natural products, viz., alstopirocine, a macroline alkaloid incorporating a substituted pyrrole moiety, pleiomaltinine, an alkaloide—pyrone adduct, and pleiomalicine, an alkaloid—carbamic acid adduct, were isolated from the Malayan Alstonia angustifolia. …”
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Unusual indole alkaloid-pyrrole, -pyrone, and -carbamic acid adducts from Alstonia angustifolia by Tan, Shin-Jowl, Choo, Yeun-Mun, Thomas, N.F., Robinson, W.T., Komiyama, K., Kam, Toh-Seok

“…Three unusual natural products, viz., alstopirocine, a macroline alkaloid incorporating a substituted pyrrole moiety, pleiomaltinine, an alkaloid-pyrone adduct, and pleiomalicine, an alkaloid-carbamic acid adduct, were isolated from the Malayan Alstonia angustifolia. …”

Oppositinines A and B: New vasorelaxant beta-carboline alkaloids from neisosperma oppositifolia by Ahmad, K., Thomas, N.F., Hadi, A.H.A., Mukhtar, M.R., Mohamad, K., Nafiah, M.A., Takeya, K., Morita, H., Litaudon, M., Arai, H., Awang, Khalijah

“…A phytochemical study on the bark of Neisosperma oppositifolia (Apocynaceae) yielded two new beta-carboline indole alkaloids, oppositinines A (1) and B (2), together with five known alkaloids, isoreserpiline, isocarapanaubine, vobasine, 10-methoxydihydrocorynantheol-N-oxide, and ochropposinine oxindole. …”

Anti-Tuberculosis natural products: synthesis and biological evaluation of pyridoacridine alkaloids related to ascididemin by Appleton, D.R., Pearce, A.N., Copp, B.R.

“…In this study we report on the synthesis and biological evaluation of a series of pyrido[2,3,4-kI] acridin-6-one alkaloids related to the anti-TB (MIC 0.35 mu M) but cytotoxic (IC(50) <0.14 mu M) marine natural product ascididemin (1). …”

Vindogentianine, a hypoglycemic alkaloid from Catharanthus roseus (L.) G. Don (Apocynaceae) by Tiong, S.H., Looi, C.Y., Arya, Aditya, Wong, Won Fen, Hazni, Hazrina, Mustafa, Mohd Rais, Awang, Khalijah

“…Vindogentianine, a new indole alkaloid together with six known alkaloids, vindoline, vindolidine, vindolicine, vindolinine, perivine and serpentine were isolated from leaf extract (DA) of Catharanthus roseus (L.) …”

Two New isoquinoline alkaloids from the bark of Alphonsea cylindrica King and their antioxidant activity by Obaid Aldulaimi, Ahmed Kareem, Abdul Azziz, Saripah Salbiah Syed, Bakri, Yuhanis Mhd, Nafiah, Mohd Azlan, Aowda, Saadon Abdulla, Awang, Khalijah, Litaudon, Marc

“…Two new isoquinoline alkaloids, iraqiine (1) and kareemine (2), along with five known alkaloids, muniranine (3), kinabaline (4), O-methylmoschatoline (5), atherospermidine (6) and N-methylouregidione (7), were purified from the dichloromethane crude extract of Alphonsea cylindrica bark. …”