Regioselective synthesis of 13C1-labeled 2-deoxyribonolactones
作者:Michael P Hayes、Paul J Hatala、Brian A Sherer、Xiaohong Tong、Nilo Zanatta、Philip N Borer、James Kallmerten
DOI:10.1016/s0040-4020(00)01148-0
日期:2001.2
Syntheses of the five regioselectively C-13(1)-labeled 5-O-benzyl-2-deoxyribonolactones are described. C-13(1)-Labeled deoxyribonolactones were prepared by addition of KCN to epoxides 7 and subsequent lactonization of the resulting nitriles. Integration of the independent schemes leading to the five isotopomers of 9 results in an efficient and cost effective preparation of labeled mixtures of C-13 mono-labeled deoxyribonolactones. These mixtures are the pivotal intermediates in the preparation of 'population labeled' C-13-labeled nucleoside phosphoramidites for solid-phase oligonucleotide synthesis. (C) 2001 Elsevier Science Ltd. All rights reserved.
Identification of isoafricanol and its terpene cyclase in Streptomyces violaceusniger using CLSA-NMR
作者:Ramona Riclea、Christian A. Citron、Jan Rinkel、Jeroen S. Dickschat
DOI:10.1039/c4cc00177j
日期:——
The recently developed CLSA-NMR technique that is based on feeding experiments with 13C-labelled precursors was applied in the identification of isoafricanol as the main volatile terpene emitted by Streptomyces violaceusniger. The isoafricanol synthase of this organism is presented, together with a recent phylogenetic analysis of bacterial terpene cyclases.