Category: 1073-39-8

Synthetic Route of 1073-39-8, These common heterocyclic compound, 1073-39-8, name is 3-Bromobicyclo[4.2.0]octa-1,3,5-triene, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

EXAMPLE 7 Preparation of 1-(4-methylphenyl)-2-(4-benzocyclobutyl)ethene STR23 A solution of 3.0 g 4-bromobenzocyclobutane, 1.9 g 4-methylstyrene, 3.0 g tri-n-butylamine, 150 mg tri-o-tolylphosphine, 36 mg palladium (II) acetate, and 10 ml of acetonitrile is stirred at reflux under nitrogen for 4 hours. The reaction mixture is poured into 60 ml of 10 percent HCl. The product is isolated by filtration, dried, recrystallized from ethanol, and isolated. About 2.9 g of monomer is prepared.

The synthetic route of 1073-39-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; The Dow Chemical Company; US4724260; (1988); A;,
Bromide – Wikipedia,
bromide – Wiktionary

1073-39-8, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 1073-39-8 as follows.

To a mixture of 3-bromobicyclo[4.2.0]octa-1,3,5-triene (569 mg, 3.1 1 mmol, 1.00 equiv) in THF (12 mL) was added n-BuLi (2.5M in hexane, 1.30 mL, 1.05 equiv) dropwise at -78C, and the mixture was stirred at -78C for 30 min. 4-(Benzyloxy)-5-bromo-2-methoxybenzaldehyde (1 g, 3.1 1 mmol, 1.00 equiv) in THF (3 mL) was then added to the solution. The reaction mixture was stirred at -78C for 2 h. NH4CI/H20 was added and the mixture was extracted with EtOAc thrice. The combined extracts were washed with brine and dried over Na2S04, then concentrated and purified by chromatography on silica gel (5:1 PE/EA) to yield 1 (4-(benzyloxy)-5-bromo-2-methoxyphenyl)(1,2- dihydrocyclobutabenzen-4-yl)methanol as a light yellow oil. MS (ES) m/z: 409.0 [M-OH]+

According to the analysis of related databases, 3-Bromobicyclo[4.2.0]octa-1,3,5-triene, the application of this compound in the production field has become more and more popular.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; GAUL, Micheal; KUO, Gee-Hong; XU, Guozhang; LIANG, Yin; (218 pag.)WO2018/89449; (2018); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 1073-39-8, name is 3-Bromobicyclo[4.2.0]octa-1,3,5-triene belongs to bromides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. 1073-39-8

To a mixture of 3-bromobicyclo[4.2.0]octa-1,3,5-triene (80 g, 437.05 mmol, 1.05 equiv) in THF (800 mL) was added n-BuLi (2.5M in hexane, 180 mL, 1.10 equiv) dropwise at -78C, and the reaction mixture was stirred at – 78C for 30 min. 5-Bromo-2-methoxybenzaldehyde (89.5 g, 416.19 mmol, 1.00 equiv) in THF (800 mL) was then added to the solution dropwise at -78C. The reaction mixture was stirred at -78C for 2 h. NH4CI/H20 was added and the mixture was extracted with EtOAc thrice. The combined extracts were washed with brine and dried over Na2S04, then concentrated and purified by chromatography on silica gel (10: 1 PE/EA) to yield (5-bromo-2- methoxyphenyl)(1,2-dihydrocyclobutabenzen-4-yl)methanol as a colorless oil.

The synthetic route of 1073-39-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; GAUL, Micheal; KUO, Gee-Hong; XU, Guozhang; LIANG, Yin; (218 pag.)WO2018/89449; (2018); A1;,
Bromide – Wikipedia,
bromide – Wiktionary