Chemoselective and Highly Sensitive Quantification of Gut Microbiome and Human Metabolites
作者:Weifeng Lin、Louis P. Conway、Miroslav Vujasinovic、J.‐Matthias Löhr、Daniel Globisch
DOI:10.1002/anie.202107101
日期:2021.10.18
The microbiome has a fundamental impact on the human host's physiology through the production of highly reactive compounds that can lead to disease development. One class of such compounds are carbonyl-containing metabolites, which are involved in diverse biochemical processes. Mass spectrometry is the method of choice for analysis of metabolites but carbonyls are analytically challenging. Herein,
Enhancing and Reversing the Stereoselectivity of<i>Escherichia coli</i>Transketolase<i>via</i>Single-Point Mutations
作者:Mark E. B. Smith、Edward G. Hibbert、Alexander B. Jones、Paul A. Dalby、Helen C. Hailes
DOI:10.1002/adsc.200800489
日期:2008.11.3
successfully applied to a 96-well format, and new active TK mutants were identified, which gave 1,3-dihydroxypentan-2-one in high stereoselectivities. Remarkably, active-site single-point mutants were identified that were able to both enhance and reverse the stereoselectivity of TK.
Total Syntheses of Carbohydrates. I. Dihydroxyacetone and DL-Erythrulose
作者:Takashi Ando、Sachiko Shioi、Masazumi Nakagawa
DOI:10.1246/bcsj.45.2611
日期:1972.8
An improved method of preparation of halopropargylalcohol is described. Hydration of halopropargylalcohol followed by hydrolysis gave dihydroxyacetone which was identified as its dibenzoate. 2-Butyne-1,4-diol was converted into acetoxymethyl vinyl ketone. 1,4-Diacetoxy-3-bromobutan-2-one obtained by the addition of acetyl hypobromite to the vinyl ketone was treated with silver acetate to yield t
Abstract The formoinreaction, i.e. , the autocondensation of formaldehyde in an aprotic solvent catalysed by the conjugate base of a thiazolium ion, has been studied in detail. Glucose, galactose, dihydroxyacetone dimer, xylose, and arabinose have been identified as products. The influence of catalysts, temperature, basicity, and reaction time is documented. N , N -Dimethylformamide is a more convenient
glycolic acid (VGA), an α‐hydroxyacid, are obtained using Sn‐MFI with selectivities towards C4 products reaching 97 %. Tin catalysts having large pores or no pore structure (Sn‐Beta, Sn‐MCM‐41, Sn‐SBA‐15, tin chloride) led to lower selectivities for C4 sugars due to formation of hexose sugars. In the case of Sn‐Beta, VGA is the main product (30 %), illustrating differences in selectivity of the Sn sites in