Tributylphosphine → {4-[3,3-Bis-(4-bromo-phenyl)-allyloxy]-3-chloro-phenyl}-acetic Acid Ethyl Ester

Temperature

2.5 °C

A solution of tributylphosphine (955 μl, 3.0 mmol), 3-chloro-4-hydroxyphenylacetic acid ethyl ester (472 mg, 2.2 mmol) and 3,3-bis-(4-bromophenyl)prop-2-en-1-ol (736 mg, 2.0 mmol) in dry THF (15 ml) was stirred at 0-5° C. for 30 min, under a atmosphere of nitrogen. Azodicarboxylic dipiperidide (756 mg, 3.0 mmol) was added the mixture stirred at 0-5° C. for 2 h, and at room temperature over night. The reaction mixture was filtered and the filtrate concentrated in vacuo. The crude product was then purified by column chromatography on silica (eluent graduated from heptane to toluene) to give 1.0 g (89%) of the title compound.

1. waitat room temperature over night
2. filtrationThe reaction mixture was filtered
3. concentrationthe filtrate concentrated in vacuo
4. customThe crude product was then purified by column chromatography on silica (eluent graduated from heptane to toluene)

ORD record

ord-747732c38f2f4f44ace3fc8d8176d064

Source dataset

uspto-grants-2005_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06869967B2