23536-23-4Relevant academic research and scientific papers
Oligomeric flavanoids. Part 26. Structure and synthesis of the first profisetinidins with epifisetinidol constituent units
Steynberg, Petrus J.,Steynberg, Jan P.,Brandt, E. Vincent,Ferreira, Daneel,Hemingway, Richard W.
, p. 1943 - 1950 (2007/10/03)
The natural occurrence of the first oligomeric profisetinidins with (2R,3R)-2,3-cis-epifisetinidol chain extender units is demonstrated in the bark of Pithecellobium dulce (Guamuchil). Semi-synthesis using the appropriate flavan-3-ol and flavan-3,4-diol precursors permits unequivocal structural and stereochemical assignment of the novel dimeric epifisetinidol-(4β,8)-catechin and epicatechins 16 and 18, the trimeric bis-epifisetinidol-(4β,6:4β,8)-catechin and epicatechins 33 and 35, the fisetinidol-(4α,8)-catechin-(6,4β)-epifisetinidol 37 and fisetinidol-(4α,8)-epicatechin-(6,4β)-epifisetinidol 39.
Metabolites from the Purple Heartwood of Mimosoideae. Part 3. Acacia crombei C.T. White: Structure and Partial Synthesis of Crombenin, A Natural Spiropeltogynoid
Brandt, Edward W.,Ferreira, Daneel,Roux, David G.
, p. 1879 - 1883 (2007/10/02)
Crombenin, 4,4',6,6',7-pentahydroxyisochroman-3'-spirobenzofuran-3(2H)-one, the first spiropeltogynoid, is related to the concominant crombeone (8-hydroxypeltogynone) from which it is derived via oxidation with alkaline hydrogen peroxide of the chalcone i
