16049-28-8Relevant academic research and scientific papers
Hydrolysis and Selective Reduction with Yeast: Enantiospecific Synthesis of Antirhine from Secologanin
Brown, Richard T.,Dauda, Bukar E. N.,Santos, Cid A. M.
, p. 825 - 826 (1991)
Glucoside hydrolysis and chemoselective reduction of secologanin ethylene acetal 2 with baker's yest affords a C-1 reduced aglucone 4 from which (+)-antirhine 8 is obtained in a four-step sequence.
General Strategy for the Synthesis of Antirhine Alkaloids: Divergent Total Syntheses of (±)-Antirhine, (±)-18,19-Dihydroantirhine, and Their 20-Epimers
Bae, Cheolwoo,Cheon, Cheol-Hong,Cho, Cheon-Gyu,Park, Eunjoon
, (2020/03/19)
A general synthetic strategy for antirhine alkaloids was developed in this study. The cyanide-catalyzed imino-Stetter reaction of ethyl 2-aminocinnamate and 4-bromopyridine-2-carboxaldehyde afforded the corresponding indole-3-acetic acid derivative. Subsequent formation of the six-membered C ring followed by trans-selective installation of the two-carbon unit at C-15 provided rapid access to the key intermediate. Stereoselective installation of substituents at C-20 allowed the total syntheses of (±)-antirhine, (±)-18,19-dihydroantirhine, and their 20-epimers, all of the known natural products in the antirhine family.
Biomimetic synthesis of monoterpenoid indole alkaloids from aglucones of secologanin derivatives: pH controlled product selectivity
Brown
, p. 609 - 616 (2007/10/03)
Variation of the pH for hydrolysis of secologanin derivatives with β-glucosidase controls rearrangement of the aglucone to afford different products, and hence stercoselective syntheses of heteroyohimbine, yohimbine and Aspidosperma-type alkaloids; with baker's yeast chemoselective reduction can also be achieved to give a precursor for antirhine and related alkaloids.
Enantio- and stereocontrolled synthesis of (-)-semburin, (+)-N-benzoylmeroquinene aldehyde, (-)-antirhine, and (+)-isocorynantheol from common (+)-norcamphor
Kawamura,Ogasawara
, p. 3369 - 3372 (2007/10/02)
A general enantio- and stereocontrolled route to the representative secologanin natural products, (-)-semburin, (+)-N-benzoylmeroquinene aldehyde, (-)-antirhine, and (+)-isocorynantheol, has been developed starting from (+)-norcamphor as a common chiral b
A Highly Enantioselective Synthesis of (-)-Antirhine by Chemo-Enzymatic Approach
Danieli, Bruno,Lesma, Giordano,Mauro, Marina,Palmisano, Giovanni,Passarella, Daniele
, p. 8837 - 8852 (2007/10/02)
(-)-Antirhine 2 was synthesized in an efficient and stereocontrolled fashion from the readily available (1R-2S)-cyclohexene dimethanol monoacetate 6.A key step was the regio- and stereoselective Pictet Spengler cyclization of the masked dialdehyde 12 to t
Carbohydrates in total synthesis of (-)-antirhine
Pancrazi,Kervagoret,Khuong-Huu
, p. 4483 - 4486 (2007/10/02)
Amide 5 was obtained by condensation between pyranose 3 and tryptamine 4; in few steps, the indoloquinolizidine 13a was prepared with a perfect stereocontrol of the 2β-H configuration; total synthesis of (-)-antirhine 2 was then achieved from 13a.
TOTAL SYNTHESIS OF (-)-ANTIRHINE
Suzuki, Toshio,Sato, Etsuko,Unno, Katsuo
, p. 839 - 842 (2007/10/02)
Total synthesis of (-)-antirhine (6) has been achieved from a potentially useful chiral synthon, (3S)-cyclopentanone (1), via β,γ-unsaturated aldehyde (5), which was obtained by mild hydrolysis of α-cyano-N,N-dimethylaminocyclopentanone (7).
CHARACTERISTICS OF VELLOSIMINE REDUCTASE, A SPECIFIC ENZYME INVOLVED IN THE BIOSYNTHESIS OF THE RAUWOLFIA ALKALOID SARPAGINE
Pfitzner, Artur,Krausch, Brigitte,Stoeckigt, Joachim
, p. 1691 - 1700 (2007/10/02)
A plant enzyme - vellosimine reductase - has been isolated from Rauwolfia cell suspension cultures.This new enzyme has been purified (110-fold) and characterized.The reductase is a specific enzyme of the sarpagine pathway catalyzing the NADPH dependent conversion of vellosimine into 10-deoxysarpagine.The latter alkaloid is the immediate biogenetic precursor of sarpagine as shown by its high in vivo incorporation rate (86percent) into sarpagine.
Synthesis of a Potential Synthon for the Chiral Synthesis of the Corynanthe-type Indole Alkaloids: Enantioselective Total Synthesis of (-)-Antirhine
Takano, Seiichi,Tamura, Nobuhiko,Ogasawara, Kunio
, p. 1155 - 1156 (2007/10/02)
The chiral formylmethyl(vinyl)tetrahydropyranone (16), a potential versatile synthon for the chiral synthesis of the Corynanthe-type indole alkaloids, has been synthesised and converted into (-)-antirhine, the major alkaloid of Antirhea putaminosa (F.Muel
