1459-11-6

Basic information

• Product Name: 1,2,4-Tris(1,1-dimethylethyl)benzene
• Synonyms: 1,2,4-Tri(tert-butyl)benzene;1,2,4-Tris(1,1-dimethylethyl)benzene;1,2,4-Tri-tert-butylbenzene
• CAS NO: 1459-11-6
• Molecular Formula: C₁₈H₃₀
• Molecular Weight: 0
• Mol File: 1459-11-6.mol
• Article Data: 17

Chemical Properties

• Melting Point: 48°C
• Boiling Point: 324.44°C (estimate)
• Flash Point: 119.7°C
• Appearance: /
• Density: 0.8496 (estimate)
• Vapor Pressure: 0.00339mmHg at 25°C
• Refractive Index: 1.4914 (estimate)
• CAS DataBase Reference: 1,2,4-Tris(1,1-dimethylethyl)benzene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,4-Tris(1,1-dimethylethyl)benzene(1459-11-6)
• EPA Substance Registry System: 1,2,4-Tris(1,1-dimethylethyl)benzene(1459-11-6)

Safety Data

• Hazardous Substances Data: 1459-11-6(Hazardous Substances Data)

Usage

Synthesis Reference(s)

The Journal of Organic Chemistry, 50, p. 3222, 1985 DOI: 10.1021/jo00217a045

InChI:InChI=1/C18H30/c1-16(2,3)13-10-11-14(17(4,5)6)15(12-13)18(7,8)9/h10-12H,1-9H3

Upstream product

• 917-92-0 3,3-Dimethylbut-1-yne 
• 300-57-2 allylbenzene 
• 872-05-9 1-Decene 
• 3710-30-3 1,7-Octadiene 
• 592-41-6 1-hexene 
• 6683-74-5 2-bromo-1,4-di-tert-butylbenzene 
• 594-19-4 tert.-butyl lithium 

Relevant articles and documents

Synthesis and Structures of Bis(indolyl)-Coordinated Titanium Dichlorido Complexes and Their Catalytic Application in the Cyclotrimerization of Alkynes

The impact of the terminal ligands on the titanium center on the coordination features of deprotonated 2,2′-bis(indolyl)methanes (henceforth: bis(indolyl)s) was studied via a structural comparison between {bis(indolyl)}Ti(NEt2)2 complexes and the corresponding dichlorido complexes. As a result, several flexible aspects of bis(indolyl) coordination were found. For example, it was revealed that an η1-coordinated indolyl moiety can change its coordination mode to coordination via the five-membered ring of indolyl when the terminal diethylamido ligands are replaced by chlorido ligands. Moreover, we found that the methoxy group in the central aromatic ring of the bis(indolyl) ligand can coordinate to the titanium center. The synthesized dichlorido complexes were applied for catalytic alkyne cyclotrimerization reactions, as Ti-based catalyst systems are less developed than Co-, Ni-, Ru-, Rh-, and Ir-based systems. During this study, the cyclotrimerization of HCCSiMe3 was found to preferentially produce the 1,3,5-form (1,3,5-form:1,2,4-form = 79:21), contrary to the typical trend of transition-metal-mediated alkyne cyclotrimerization, and the isolated yield (72%) is the highest among the known 1,3,5-favoring reactions using Ti-based catalyst systems. Furthermore, the reaction mechanism was experimentally verified to proceed through a typical stepwise mechanism involving monomeric species.

Iron-catalyzed regioselective cyclotrimerization of alkynes to benzenes

We report the synthesis and characterization of simple di(aminomethyl)pyridine ligated iron-pincer complexes, which catalyzed the regioselective [2+2+2] cyclotrimerization of terminal aryl and alkyl alkynes to provide the 1,2,4-trisubstituted benzene molecules. Interestingly, internal alkynes also exhibited similar cyclization and resulted in hexa-substituted benzene compounds. Increased steric bulk on pincer ligands diminished the selectivity for cycloaddition. Cyclotrimerization reactions proceeded at room temperature upon activation of catalyst by a Grignard reagent. EPR studies indicated thermally induced spin crossover effect in catalyst.

Can the Ti(OiPr)4/nBuLi combination of reagents function as a catalyst for [2+2+2] alkyne cyclotrimerisation reactions?

Catalysis of the cyclotrimerisation of alkynes with the Ti(OiPr)4/nBuLi system was studied, leading to the development of a particularly convenient and reliable protocol. This method allows the [2+2+2] cycloaddition reaction to proceed within a few minutes under microwave conditions, with generally good selectivity from a variety of aromatic and aliphatic alkynes.