Chemistry is traditionally divided into organic and inorganic chemistry. Computed Properties of C4H6O3, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 7331-52-4
Establishing a novel biosynthetic pathway for the production of 3,4-dihydroxybutyric acid from xylose in Escherichia coli
3-Hydroxy-gamma-butyrolactone (3HBL) is an attractive building block owing to its broad applications in pharmaceutical industry. Currently, 3HBL is commercially produced by chemical routes using petro-derived carbohydrates, which involves hazardous materials and harsh processing conditions. Only one biosynthetic pathway has been reported for synthesis of 3HBL and its hydrolyzed form 3,4-dihydroxybutyric acid (3,4-DHBA) using glucose and glycolic acid as the substrates and coenzyme A as the activator, which involves multiple steps (>10 steps) and suffers from low productivity and yield. Here we established a novel five-step biosynthetic pathway for 3,4-DHBA generation from D-xylose based on the non-phosphorylative D-xylose metabolism, which led to efficient production of 3,4-DHBA in Escherichia coli. Pathway optimization by incorporation of efficient enzymes for each step and host strain engineering by knocking out competing pathways enabled 1.27 g/L 3,4-DHBA produced in shake flasks, which is the highest titer reported so far. The novel pathway established in engineered E. coli strain demonstrates a new route for 3,4-DHBA biosynthesis from xylose, and this engineered pathway has great potential for industrial biomanufacturing of 3,4-DHBA and 3HBL.
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem