Starting from vinylpyranoses an iron-catalyzed tandem isomerization–intramolecular aldolization reaction was developed to prepare cyclohexenone derivatives bearing substituents on the double bond, and it has been applied in a short synthesis of 4-epi-gabosines A and B, from D-glucose.
FN1 (1) and FN2 (2), cycloadducts of alpha-ketol octaclecadienoic acid (3) with norepinephrine (NE), induce flowering in Lemna paucicostata. In order to broaden our understanding of structural requirements of FN for flower induction, nine analogs of 3 (4-12) were synthesized and reacted with NE under basic conditions. These analogs, except for 8, 10, and 12, exhibited significant activity regarding to floral induction in L. paucicostata. Similar experiments were carried out by using 3 and epinephrine, and it was demonstrated that these products also possessed biological activity. (C) 2008 Elsevier Ltd. All rights reserved.
Claisen rearrangements of lactonic (silyl) enolates: a new route to functionalized cycloalkenes
作者:Samuel Danishefsky、Raymond L. Funk、James F. Kerwin
DOI:10.1021/ja00542a058
日期:1980.10
Pirillo; Gazzaniga; Leggeri, Farmaco, Edizione Scientifica, 1985, vol. 40, # 4, p. 249 - 252
作者:Pirillo、Gazzaniga、Leggeri、Giaccone、Traverso
DOI:——
日期:——
TRAVERSO, G.;PIRILLO, D.;GAZZANIGA, A., FARMACO. ED. SCI., 1982, 37, N 3, 192-198