2019年3月26日 · Be warned: tert-butyl has received special treatment from IUPAC on this front. Other non-systematic prefixes have fallen from favour, most notably isopropyl, sec -butyl, and isobutyl. The preferred prefixes are respectively propan-2-yl, butan-2-yl, and 2-methylpropyl.

2017年10月24日 · An alternative name is 3-tert-butyl-1-(1-methylpropyl)benzene. (Actually, the 2013 Recommendations do explicitly say that this molecule is not to be called 1-sec-butyl-3-tert-butylbenzene, but by one of the other two names instead. This is because the name sec-butyl is no longer retained.

2015年7月16日 · Peptide synthesis is particularly amenable to use of tert-butyl protection of hydroxyl groups because (1) all of the suitably protected residues are commercially available and (2) the protecting groups have been designed to be globally deprotected with trifluoroacetic acid. These factors minimize the inherent inefficiency to protecting groups.

The second reaction is removal of tert-Butyl group from tert-butyl carboxylate ester. The mechanism is similar for both cases except for release of $\ce{CO2}$ group from BOC group giving two gaseous byproducts ($\ce{CO2}$ and isobutylene), which would not interfere with isolation process. This is the advantage of using BOC protection group in ...

2021年11月14日 · $\begingroup$ I think I understand: The acid generated isobutylene, which in turn was oxidized by the potassium permanganate originally intended to prove that tert-butyl alcohol doesn't react. This is then oxidized into water, carbon dioxide, and 2-propanone (acetone).

So do the two other methyl groups. The amount of partial negative charge accumulated on $\ce{C2}$ of tert-butyl group (has 3 methyl groups) is more than that on methyl group (only has 3 hydrogens) of acetic acid. The more negative charge on $\ce{C2}$ in tert-butyl acetic acid destabilizes the conjugate base, compared to a simple acetate ion.

2018年6月11日 · (d) There are also two ways to attach the group derived from isobutane. You can attach it from one of the end carbons, in which case we call it an "isobutyl" group, or you can attach it from the center carbon, in which case it's "t-buty" or "tert-butyl" for "tertiary" butyl because the attachment carbon is a tertiary carbon.

2018年7月2日 · For reaction with $\ce{KMnO4}$, the given compound must have a carbon atom attached directly to the ring and that carbon atom must have at least one hydrogen atom.

2020年6月10日 · The tert-butyl group is very bulky, resulting in strong 1,3-diaxial interactions when in the axial position. This makes the A value of the tert-butyl group exceptionally high—about 5 kcal/mol. Compare this with the A values of other groups, almost all of which lie under 2 kcal/mol.

2017年4月27日 · What you've drawn in your bottom figure is an example of carbon-carbon hyperconjugation.The t-butylbenzene and the charge separated structure drawn to its right are resonance structures (so you should use a double-headed resonance arrow to connect them).