([5-13C] Tetrazol-5-yl)methyl ketones were prepared and subjected to oxidative fragmentation induced by lead tetraacetate. The resulting intermediate [1-13C]-3-oxoprop-1-en-1-ylidenes rearrange, depending on the relative migratory aptitudes of the benzoyl group and the ligands R, either to [3-13C]prop-2-yn-1-ones or to [2-13C]prop-2-yn-1-ones or to mixtures of the two isomers. The 1H and/or 13C NMR
([5- 13 C]四唑-5-基)制备并经受由四乙酸铅诱导的氧化断裂的甲基酮。将得到的中间体[1- 13 C] -3-氧代丙-1-烯-1- ylidenes重新排列,取决于苯甲酰基的相对迁徙性向和配体R,要么[3- 13 C]丙-2- yn-1-one或[2- 13 C] prop-2-yn-1-one或两种异构体的混合物。产物的1 H和/或13 C NMR光谱可以区分这三种情况。发现相对迁移能力为H> PhCO,4-MeOC 6 H 4 > 4-O 2 NC 6 H 4。
Synthesis of 13C labelled daidzein and formononetin
作者:Jacqueline L. Whalley、Timothy J. Bond、Nigel P. Botting
DOI:10.1016/s0960-894x(98)00453-3
日期:1998.9
Efficient methods are described for the synthesis of daidzein and formononetin labelled with a single C-13 atom at the I-position, to prepare material for metabolic studies. (C) 1998 Elsevier Science Ltd. All rights reserved.
[EN] SYNTHESIS OF <13>C-LABELLED ESTROGEN ANALOGUES<br/>[FR] SYNTHESE D'ANALOGUES D'OESTROGENES MARQUES PAR <13>C
申请人:UNIV ST ANDREWS
公开号:WO2004069774A3
公开(公告)日:2005-02-03
Synthesis of [4-13C]-Isoflavonoid Phytoestrogens
作者:Jacqueline L Whalley、Mark F Oldfield、Nigel P Botting
DOI:10.1016/s0040-4020(99)01014-5
日期:2000.1
Efficient syntheses are described for 13C-labelled derivatives of the isoflavonoid phytoestrogens, genistein, biochanin A, daidzein and formononetin, for use in metabolic studies. The synthetic procedure employs 13C-labelledcyanide as the source of the label to produce the isoflavones with a single 13C atom at the C-4 position.