Oligomeric flavanoids. Part 24. Controlled biomimetic synthesis of profisetinidin triflavanoid related phlobatannins
作者:Catharina M. Saunders、S USAnna L. Bonnet、Jan P. Steynberg、Daneel Ferreira
DOI:10.1016/0040-4020(96)00237-2
日期:1996.4
The complex structures of the economically important group of profisetinidintriflavanoidrelatedphlobatannins are synthetically accessable in a controlled biomimetic fashion via the repetitive formation of the interflavanyl bond and pyran ring rearrangement of the chain extender unit under mild alkaline conditions.
Novel base-catalysed rearrangements of (–)-fisetinidol-(+)-catechin profisetinidins with 2,3-trans-3,4-cis-flavan-3-ol constituent units
作者:Jan P. Steynberg、Johann F. W. Burger、Desmond A. Young、Edward V. Brandt、Jacobus A. Steenkamp、Daneel Ferreira
DOI:10.1039/c39880001055
日期:——
The (–)-fisetinidol-(4β, 8)-(+)-catechin-O-methyl ether (1) is subject to facile C-ring isomerizations in NaHCO3–Na2CO3 buffer solution to form a range of novel 8,9-cis-9,10-trans- and 8,9-trans-9,10-trans-3,4,9,10-tetrahydro-2H,8H-pyrano-[2,3-h]chromenes (2)–(5); analogues (4) and (5) are representative of an unique class of phlobatannins in which the resorcinol A- and pyrocatechol B-rings are interchanged
(–)-菲塞替尼多-(4β,8)-(+)-儿茶素-O-甲基醚(1)在NaHCO 3 -Na 2 CO 3缓冲溶液中容易进行C环异构化,形成了一系列新型8,9-顺式-9,10-反式-和8,9-反式-9,10-反式-3,4,9,10-四氢-2 H,8 H-吡喃基- [2,3- h ]铬烯(2)–(5); 类似物(4)和(5)代表一类独特的phlobatannins,其中间苯二酚A-和邻苯二酚B-环互换。
STEYNBERG, JAN P.;BURGER, JOHANN F. W.;YOUNG, DESMOND A.;BRANDT, EDWARD V+, J. CHEM. SOC. PERKIN TRANS. PT 1,(1988) N2, C. 3331-3338
作者:STEYNBERG, JAN P.、BURGER, JOHANN F. W.、YOUNG, DESMOND A.、BRANDT, EDWARD V+
DOI:——
日期:——
STEYNBERG, JAN P.;BURGER, JOHANN F. W.;YOUNG, DESMOND A.;BRANDT, EDWARD V+, J. CHEM. SOC. CHEM. COMMUN.,(1988) N 15, 1055-1057
作者:STEYNBERG, JAN P.、BURGER, JOHANN F. W.、YOUNG, DESMOND A.、BRANDT, EDWARD V+
DOI:——
日期:——
Steynberg, Jan P.; Burger, Johann F. W.; Young, Desmond A., Journal of the Chemical Society. Perkin transactions I, 1988, p. 3331 - 3338
作者:Steynberg, Jan P.、Burger, Johann F. W.、Young, Desmond A.、Brandt, Edward, V.、Steenkamp, Jacobus A.、Ferreira, Daneel