Crystal structure of (3R,4S)-6,8-dihydroxy-3,4,5-trimethyl-1- oxoisochroman-7-carboxylic acid, C13H14O6

Chang, Hong; Li, Xiang; Fu, Jing; Cheng, Kui; Ye, Yonghao; Guo, Jian‐Hua

doi:10.1524/ncrs.2009.0187

Zeitschrift Für Kristallographie - New Crystal Structures

2009

DOI: 10.1524/ncrs.2009.0187

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Crystal structure of (3R,4S)-6,8-dihydroxy-3,4,5-trimethyl-1- oxoisochroman-7-carboxylic acid, C13H14O6

Hong Chang¹,

Xiang Li²,

Jing Fu³

et al.

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2018

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Large-scale total synthesis of 13C3-labeled citrinin and its metabolite dihydrocitrinone

Bergmann

Hübner²,

Wibbeling³

et al. 2018

Mycotoxin Res

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The analysis of the nephrotoxic mycotoxin citrinin in food, feed, and physiological samples is still challenging. Nowadays, liquid chromatography coupled with mass spectrometry is the method of choice for achieving low limits of detection. But matrix effects can present impairments for this method. Stable isotope dilution analysis can prevent some of these problems. Therefore, a stable isotopically labeled standard of citrinin for use in stable isotope dilution analysis was synthesized on large scale. The improved diastereoselective total synthetic strategy offered the possibility to introduce three C-labels in two steps by ortho-toluate anion chemistry. This led to a mass difference of 3 Da, sufficient for preventing spectral overlap. Additionally, a stable isotopically labeled form of dihydrocitrinone, the main urinary metabolite of citrinin, was synthesized with the same mass difference. This was achieved by a sequence of cyclisation, oxidation, deprotection, and carboxylation reactions starting from a protected intermediate of the labeled citrinin synthesis. Thus, this method also offers a complete way to synthesize dihydrocitrinone from citrinin on large scale.

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Large-scale total synthesis of 13C3-labeled citrinin and its metabolite dihydrocitrinone

Bergmann

Hübner²,

Wibbeling³

et al. 2018

Mycotoxin Res

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show abstract

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Crystal structure of (3R,4S)-6,8-dihydroxy-3,4,5-trimethyl-1- oxoisochroman-7-carboxylic acid, C13H14O6

Cited by 1 publication

References 7 publications

Large-scale total synthesis of 13C3-labeled citrinin and its metabolite dihydrocitrinone

Large-scale total synthesis of 13C3-labeled citrinin and its metabolite dihydrocitrinone

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