20012-63-9Relevant articles and documents
First Total Synthesis of the Cytotoxic Carbazole Alkaloid Excavatine-A and Regioselective Annulation to Pyrano[2,3-a]carbazoles and [1,4]Oxazepino[2,3,4-jk]carbazoles
Brütting, Christian,Kataeva, Olga,Schmidt, Arndt W.,Kn?lker, Hans-Joachim
, p. 3288 - 3300 (2017)
We describe the first total synthesis of the cytotoxic carbazole alkaloid excavatine-A. The carbazole framework was constructed through double C–H bond activation of a diarylamine by using our palladium(II)-catalyzed oxidative cyclization. Treatment of th
Synthesis of aspidodispermine via pericyclic framework reconstruction
Reu?, Franziska,Heretsch, Philipp
supporting information, p. 3956 - 3959 (2020/05/19)
A divergent approach to the pyrroloquinoline scaffold as present in the class of Aspidosperma alkaloids was developed. As a case study, abundant and renewable nicotinic acid was transformed via pericyclic framework reconstruction into aspidodispermine, a unique member of pyrroloquinoline alkaloids. The sequence comprises a [2 + 2]-photocycloaddition, a Ramberg-B?cklund contraction, and a strain-promoted formal electrocyclic rearrangement of a bicyclo[2.2.0]hexene and is potentially extendable to pyrroloindole scaffolds as present in the ibophyllidine alkaloids.
IMPROVED PROCESS FOR THE PREPARATION OF [3R,5R]-2-FLUOROPHENYL-β,δ- DIHYDROXY-5-(1-METHYLETHYL)-3-PHENYL-4-[(2-HYDROXYPHENYLAMINO)- CARBONYL]-1H-PYRROLE-1-HEPTANOIC ACID, SODIUM SALT
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Page/Page column 13; 15; 16, (2016/09/26)
The present invention relates to an improved process for the preparation of [3R,5R]-2-fluorophenyl-β,δ-dihydroxy-5-(1-methylethyl)-3-phenyl-4-[(2-hydroxyphenylamino)-carbonyl]-1H-pyrrole-1-heptanoic acid sodium salt compound of formula- 1 represented by the following structural formula: