A concise total synthesis of biologically active frutinones via tributylphosphine-catalyzed tandem acyl transfer-cyclization
摘要:
A concise and step-economical total synthesis of biologically active frutinones has been achieved. Tributylphosphine (PBu3) efficiently induced the tandem acyl transfer-cyclization of carbonates 5 to afford 3-methoxycarbonylflavone derivatives 4 in excellent yields. Finally, concomitant deprotection and lactonization under acidic conditions furnished the desired frutinones A (1a), B (1b), and the proposed structure of frutinone C (1c). (C) 2014 Elsevier Ltd. All rights reserved.
Design and synthesis of chiral and regenerable [2.2]paracyclophane-based NAD(P)H models and application in biomimetic reduction of flavonoids
作者:Zhou-Hao Zhu、Yi-Xuan Ding、Bo Wu、Yong-Gui Zhou
DOI:10.1039/d0sc04188b
日期:——
With the rapid development of biomimetic asymmetric reduction, the demand for efficient chiral and regenerable NAD(P)Hmodels is growing rapidly. Herein, a new class of [2.2]paracyclophane-based chiral and regenerable NAD(P)Hmodels (CYNAMs) was designed and synthesized. The first enantioselective biomimetic reduction of tetrasubstituted alkene flavonoids has been successfully realized through enzyme-like