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In enzymology, a 2-oxobutyrate synthase (EC 1.2.7.2) is an enzyme that catalyzes the chemical reaction 2-oxobutanoate + CoA + oxidized ferredoxin ⇌ {\displaystyle \rightleftharpoons } propanoyl-CoA + CO 2 + reduced ferredoxin
1,2-Epoxybutane is an organic compound with the formula CH 2 (O)CHCH 2 CH 3. It is a chiral epoxide prepared by oxidation of 1-butene. [1] References
In enzymology, a 3-methyl-2-oxobutanoate hydroxymethyltransferase (EC 2.1.2.11) is an enzyme that catalyzes the chemical reaction 5,10-methylenetetrahydrofolate + 3-methyl-2-oxobutanoate + H 2 O ⇌ {\displaystyle \rightleftharpoons } tetrahydrofolate + 2-dehydropantoate
The enzyme 4-oxalmesaconate hydratase (EC 4.2.1.83) catalyzes the chemical reaction 2-hydroxy-4-oxobutane-1,2,4-tricarboxylate ⇌ {\displaystyle \rightleftharpoons } (1 E ,3 E )-4-hydroxybuta-1,3-diene-1,2,4-tricarboxylate + H 2 O
Oxo alcohols are alcohols that are prepared by adding carbon monoxide (CO) and hydrogen (usually combined as synthesis gas) to an olefin to obtain an aldehyde using the hydroformylation reaction and then hydrogenating the aldehyde to obtain the alcohol. [1]
In enzymology, a [3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring)] (EC 2.7.11.4) is an enzyme that catalyzes the chemical reaction ATP + [3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring)] ⇌ {\displaystyle \rightleftharpoons } ADP + [3-methyl-2-oxobutanoate dehydrogenase (acetyl-transferring)] phosphate
≡ (G ℏ ⁄ c 5) 1 ⁄ 2: ≈ 5.391 16 × 10 −44 s [26] second (SI base unit) s ≡ Time of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom at 0 K [8] (but other seconds are sometimes used in astronomy).
1,4-Butynediol is a precursor to 1,4-butanediol and 2-butene-1,4-diol by hydrogenation. It is also used in the manufacture of certain herbicides, textile additives, corrosion inhibitors, plasticizers, synthetic resins, and polyurethanes. It is the major raw material used in the synthesis of vitamin B 6. [5]