30540-31-9

Upstream product

• 563-78-0 2,3-Dimethyl-1-butene 
• 19550-30-2 2,3-dimethylbutanol 
• 79-29-8 2,3-dimethylbutane 
• 54004-42-1 2,3-dimethyl-butanoic acid, ethyl ester 
• 30540-29-5 butanoic acid, 2,3-dimethyl-, methyl ester 
• 14287-61-7 2,3-dimethylbutyric acid 
• 108-64-5 Ethyl isovalerate 
• 93088-62-1 2,3-dimethylbutyl 4-methylbenzenesulfonate 

Downstream Products

• 1900-53-4 campesteryl acetate 
• 1900-53-4 24-methylcholest-5-en-3β-yl acetate 
• 3302-06-5 3,4-Dimethylpentanoic acid 

Relevant academic research and scientific papers

Halogenation with N-Halo-2-oxazolidinones. The Chain-carrying N-Centered Radicals

Selectivities in halogenation of 2,3-dimethylbutane, 1-chlorobutane and substituted toluenes with N-chloro- or N-bromo derivatives of 4,4-dimethyl-2-oxazolidinone (NXDMO), 2-oxazolidinone (NXO), and succinimide (NXS) were examined.In the presence of olefi

A Convenient Synthesis of (22S)-22-Hydroxycampesterol and Some Related Steroids

As possible candidates for intermediates in brassinolide biosynthesis, (22S)-22-hydroxycampesterol 1 and its related new steroids 5-7 are conveniently synthesized by employing the Grignard reaction of a known steroidal 22-aldehyde 8 with 2,3-dimethylbutylmagnesium bromide as a key reaction.

Comparison of gif-type reactivity towards alkanes with standard radical reaction selectivity. Gif oxidation of n-butane and propane

A precise comparison has been made between radical bromination of a series of saturated hydrocarbons using BrCCl3 and the bromination of the same series with the same reagent under Gif-type (GoAggIII) conditions. The relative reactivities in the two series are completely different and confirm a difference in mechanism. Experiments with n-butane and with propane have shown that these gases react with the usual Gif selectivity to furnish 2-butanone and acetone respectively.

REACTIONS OF BrCl WITH ALKYL RADICALS.

It is demonstrated that photohalogenation of low reactivity substrates with BrCl occurs mainly with Cl. selectivity.With tertiary or benzylic hydrogens in the substrate, mainly Br. selectivity is observed.These observations are rationalized, taking into account the relative concentrations of halogen atoms and their respective rates of hydrogen abstractions.The resultant radicals react with BrCl to make (RBr/RCl) in ratios between 1 and 15.

Reactions of a Graded Set of Radicals with N-Bromosuccinimide; Two Transition States

The reactions of N-bromosuccinimide with a series of radicals have been studied.These reactions fall into two categories, the more reactive radicals producing ?-succinimidyl and the less reactive radicals producing ?-succinimidyl.The threshold for the changeover from one reaction domain to the other occurs with radicals less reactive than secondary alkyls.These results are interpreted with two transition states, an in-line transition state for the more reactive radicals and an out-of-plane transition state for the less reactive radicals. An upper limit of 18 kcal/mol is established for the enthalpy difference, HS? - HS?.Two new methods for generating S? radicals are indicated.